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
Scared? No... Tired of being pushed around? Yes!