You can't eradicate religions because more will be spawn in the next generation

That is unless we start selectively breeding people to think rationally, but those kind of people usually off themselves pretty early or choose to celibate out of frustration of the stupidity around them, a shame really.
As for religion enabling atrocities, no it doesn't. The problem stems from self-delusion and egotism. We all believe we're right and we'll do anything to prove it in order to protect our ego. Look up the list of cognitive bias. It's absolutely mind-blowing.
The things we do to protect our frail little ego

Religion is just another tool for self-delusion. Praying, in particular, is quite amusing. We like to fool ourselves that we have the ability to change things out of our control by praying to an invisible man, lol.
In the end, you can't expect too much. We're still only animals. There's a biological limit to our brain. You can't blame them or scream at them in frustration. It's like children, the only thing you can do is explain things to them and hope that one day they'll grow up.
I've thought about it a lot. There's no way 6.5 billion people on Earth can desert the primitive mindset and hold hands together to work toward life extension, space exploration, etc. Let me know if you find a solution.
In the meantime, cheer up and look on the bright side. There's no way for society to function without "religious thinking." I can already see it disintegrating, hedonism, nihilism, suicide. While thinking in a rational manner doesn't cause these behaviors, when you remove the precious little delusion, weak people have nothing left to hang on to. It's a self-defense mechanism for them.
What you have to do is covertly use this to your advantage. Become a cult leader, become a politician, start a religion or dedicate your life to science, etc.
If you truly are smart enough and this rational thinking is a useful as it seems, then religious people should pose no problem.
Most of them work their whole lives to keep society functioning, taking vacation once in a while. Sure, they have irrational beliefs, but they never do anything about it anyway. What's troubling is the people on top, and I'm quite sure some of those people don't believe their own bullshit.
Deception is slavery, and slavery is necessary for the proper functioning of society and civilization.
As for the issue of crimes, life itself necessitate crime.
I don't foresee them posing much of a problem for life extension. You see, like children, if you give them a piece of candy, they'll surely take it. Self-delusion/faith/principle can be temporarily put on hold and conveniently put away if necessary. It's like those people that oppose stem cells. Suppose they go blind and given the choice of restoring their sight with stem cells, not one of them will refuse the offer. Life extension is an even harder deal to refuse. It works like it always will.
A brilliant caveman started the first fire but his brother pissed all over it because it was evil, and playing God. A few of us will always go on dragging the rest of humanity.