Ex-theists are often like ex-smokers, sanctimonious and insufferable.

[Whateverist]

People of all beliefs and backgrounds do that everyday. How are religious people special? If you accept the idea that religious people do harm because of religion, then are you ready to accept the balance by good deeds done by religious people, or do you think only bad deeds count? How does that work?

Of course the good deeds done due to religion count.  Now, tell me, how many good deeds does it take to balance against a beheading?  

Edited to add:

When smokers and drinkers start beheading others due to their smoking and drinking, then we can start to talk about how such things compare with religion.  But otherwise, it is a bullshit analogy.

Were you a smoker?

But the problem with balancing the good with the bad the way you're doing it is you are holding each and every religious person responsible for the actions of every other religious person, living and dead.  If you can't see the absurdity of that you need glasses.