If Atheism and Religionism are destroyers of civilization, then what is the answer?

Basically, if a creator does not exist, then we are all random quirks of nature, and whether we live of die, matters not in the grand scheme of nature. Atheism has led to terrible political systems that have killed millions of people in body and spirit.

Religionism is when a group of people gets political power or influence over a group of believers (inquisition, witch trials, Islamic terrorists, Jim Jones, etc.), versus freedom of religion and personal faith.

It seems that both atheism and religion ism (fundamentalism) need to be intellectually shown to have no merit.

The answer is Christianity!!!

Very true,if nothing matters in the grand scheme of nature, what is stopping you from become a 'natural born killer', for your own survival. If religion ism gets political power, it only means war.

Freedom of religion and tolerance towards other beliefs is the only way to go.

The middle way I guess...no extremes, no intolerance and no stupidity...

That's some pretty poor logic there. You basically just said: "Stalin was an atheist, so atheists must be bad. Osama bin Laden is a Muslim, so Muslims must be bad. The Inquisition were Christian, so Christians must be bad." You might as well have said: "There are bad people in all walks of life, therefore everyone is bad"

Atheism has never ran any political systems. If you are trying to attribute Marxism to atheism, you are wrong in the causationALink. Marxism develops from the idea that there is a struggle of classes and that these are the cause of all our problems. They believe that religion is used to enslave people, so atheism in that context is just a small component.

Marxist believe that if we make everyone "equal" everything will be okay. Sadly, it is science and modern reality that has refuted Marx. It has been seen how people's biological determinants work counter to the notion of Marx. We now realize our innate drive towards superiority and control. And if you look closely at communist states, they are not like Marx described them to be because there is still "ruling class" putting Communism in place.

The answer is tolerance. where everyone could have their own religion, without being forced to worship anyone Else's.

Atheism is probably the best "religion" because it can be used by any person of any race and political belief.

Atheistic fundamentalism has lead to communism.

Christian fundamentalism has lead to many many wars.

Islamic fundamentalism has killed many "non-believers".

Answer to your question is: all kinds of fundamentalism are bad and have no merit. (but normal atheism does)

Your opinions are worth to be considered.
Yes, all the man made 'isms' lead to destruction, not only the civilization but all other good things. Each group claims some narrow and exclusive doctrines, and say various fabrications against other groups.
The answer is that each individual should independently seek for the One True God and to apply His divine lesson of selfless love for all mankind. If each man didn't raise himself to his spiritually noble station, none of any 'man-isms' would be able to do anything good for him.
Please think independently and make responsible choice for your destiny. Peace of mind is peace of the world.