Why most of atheists here on this forum feel so threatened that they have to attack against religious world view all the time?
Are they so insecure about their own world view? Why they are so scared?

Atheists are neither threatened nor scared...
Atheists have been under attack from Christians since... well... forever...
Atheists are only now beginning to defend themselves against all the lies and slander that Christians have thrown at us throughout the centuries... It's self-defense
Atheists want to remove all the crazy laws that Christians have established in this country... like laws that allow you to murder your child in the name of religion (prayer in lieu of medical treatment)... homophobic laws... (previously slavery... look it up... Christians used the bible to support slavery!)... shall I bring up the witch-hunts (I live in the city where that happened)?
Scared? No... Tired of being pushed around? Yes!