Well it really varies. Btw I believe in the first amendment. But if you look at the times when the church ruled over countries, scientific progress was not made because there would be a conflict between science and Christianity. So it really creates ignorance. I think in some Muslim countries they ban the teaching of evolution.
religion holds back human progress
Religion is only bad when people use it as a reason to hate other people
Religion in and of itself is not bad for society. It only turns sour when: A) people in power use religion for no other reason than to sway people or voters to their cause. or B) The devoutness of the individual is detrimental to the well-being of others [i.e. extremist Muslims or Christians shooting up clubs or abortion clinics (respectively) because they disagree with their choices].
There are so many different ways to interpret a religion, and therefore it is not inherently evil. Religion only brings out who the people are; the people who want to do good use religion to justify their good acts, while those who use it for hate use it to justify their evil acts.
I am an agnostic atheist, and I believe that religion isn't bad for society as long as it doesn't affect or hurt others.
Religion is one of the leading causes of division among people. People used religion to justify the killings and slavery of other people. Not to mention the fanatics that follow religion. Religion throughout history has also tried to silence Science which would of stopped man advancing. But by all means I have nothing against people that are religious until you try and force it upon me. I am an atheist but I will become a militant atheist if religion became a threat to me.