Which is a pretty dumb reason, I gotta say.
Especially the "science can't explain death" part.
Of course it can; You die when the neurons in your brain stop firing.
Also I hate the "repent" bullstuff spewed by most religions. Your "just and loving" omnipotent god is going to sentence you to an eternity in hell for not believing in its existence, or questioning its existence when it has provided virtually no legitimate proof? If it's omnipotent, then it obviously would know how flawed man is when it created man, right? Or even more so; It's "JUST AND LOVING". If it loved all human beings, then wouldn't it forgive atheists? EVEN MORE SO, why would it feel irrational human emotions like forgiveness or even love? Is it even sentient if it is beyond our realm of understanding?
If there is a god, then there's very few things that would sentence you to hell: Murder, Rape, and generally being Evil. That's all.