Whatever I'm going to say here might sound paindoo... but if Pakistan were to become a secular state, the name just wouldn't be "Pakistan". Because Pakistan ka matlab kiya- La Ilaha Illallah.

Not being a secular state would, as you've put it very wisely, negate the very concept of The Two Nation Theory. Pakistan was made for the Muslims (No offense to the minorities- they're welcome too).

Secularism does not mean the same thing as opposition to religion. Secularism means that no particular religion is given preference over another by the state. All the religions are treated equally. In that sense I am all for secularism as well.

The two nation theory no longer applies here. We have reaped as much we could from it. We are no longer two nations and the boundary is also not very clear. In Pakistan alone there are Muslims, Sikhs, Hindus, Christians, and may be people from other faiths or Atheists. So I guess it is time to move on.

I am not associated to PPP or Salman Taseer's Family in any way.
And I want a secular Pakistan.

Ask me again and I will tell you the answer ;)
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Strangely enough I couldn't find a button to post a second answer so I am editing this post. @gX may be you should look into this ;)

Her is my answer Awais.

I believe religion is a personal matter and state should not have any say in it. The concept of a state religion is so absurd.

If a state has religion than anyone can do something on the basis of religion and no one will be able to challenge it.
Let me give you some examples from Pakistan. General Zia. He introduced a law that banks should deduce Zakat from every account on1st ramzan every year. Now that is totally against what Islam says but no one was able to challenge him. Even Supreme court ruled against it later but we still have to give banks an affidavit from magistrate office to not cut of our zakat from our bank accounts. That is just insane.

Another example. Declaring someone kafir. Ahmadis were declared kafir according to 1973 constitution. Now just read some historical facts and you will know how much suffering this has caused to that community. Because some illiterate people who didn't knew a thing about religion and just blindly following a mullah's direction have killed so many Ahmedis and they still go unpunished. People of that community are even afraid to declare themselves ahmedi in public. Now that is insane.

Do you know according to Islam if someone leaves Islam than he is "wajbul qatl". Now because we live in an "Islamic Country" if someone changes his mind about Islam e,g maybe he becomes atheist or follow some other religion, he wouldn't be able to declare it openly or otherwise his head would be on a plate :P

Remember Salman Taseer's murder ?? His killer is still alive without any punishment. In a secular state he would have been served justice a long time ago. Just like our courts served justice to the rangers who killed Sarfarz Nawaz. But because Salman Taseer's murder was done on a religious basis instead of condemning him a majority of our nation supports his barbaric act.

Few days ago Punjab govt released a banned organisations head after 10 years of jail. He openly claims that he has killed countless shias because they are not the real "Muslims" or don't follow the Islam according to his version. In a secular state someone with that many murders on his hand would have been condemned to a lifetime of prison if not capital punishment.

These are just few examples.

A nation should not be united because it has the same religion but it should be united because it is a NATION. Otherwise some people would advocate a Khilafat movement here whose ultimate objective would be reuniting the whole 1.5 Billion Muslims under one ruler through whatever means possible including removing a democratic govt. (Hizb Tahrir)

Lets talk about Two Nation theory. Quaid-e-azam wanted a secular state. The sooner you accept this fact the more open your mind be about this kind of discussion. He was a member of Congress before Muslim League. He was "the" biggest supporter of hindus and Muslims and everyone else living together in harmony. It all changed when he observed the racial discrimination done by illiterate people of India against Muslims. He wanted a separate country for the Muslim people so they can freely practice there religion. There are still as many Muslims in India as in Pakistan. And they are living happily.

Besides the Two nation theory failed the day Bangladesh decided to part its ways from Pakistan into a secular state.

The slogan "Pakistan ka matlab kiya- La Ilaha Illallah" was an invention of the Muslim leaders of Muslim league to rally the Muslims behind there cause of separate country. Neither Quaid nor Iqbal ever used this kind of slogan.

Most of my arguments and examples are based on Pakistan and Islam. But even if you look beyond this you will find countless examples of this. One major example is Israel.
Is it a coincidence that two most trouble making countries of the world came into existence on the basis of religion. (Pakistan and Israel)

If you any questions please ask and I would try to clarify them :)

I am nobody to suggest if Pakistan should be secular state or not. But I believe in our leader, Quaid e Azam, and his vision was of a secular state.He wanted Pakistan to be 'The state where every citizen would be equal and there would be no distinction between citizen on the basis of faith or caste or creed.' Thus unlike India, he believed in equal treatment of every Pakistani, even if he is Christian or Hindu.
Being a follower of Quaid-e-Azam, I also believe in his vision..
(P.S I am against PPP)

it is a problem, without religion, the formation of pakistan initially doesnt make sense... with religion, our border with afghanistan doesnt make sense... And that my friends, is pakistan, whose existence doesnt make sense. But its a pain in the @$$ for many, and i always say this that it is a reason, probably the only reason, for my sense of belonging. call it absurd, but this is what it has been reduced to.
the islam i know, has pretty much in common with secularism, although not everything. one of the things that bug me is, why is the punishment of munkar death!. i dispute it but an overwhelming majority says so.... and i find it contradictory. people normally dont realize, there are scores of atheists and so called atheists among us, they are just closeted! why not let them come out!... but 'OUR' islam is a threat to them.