Fundamentalism of all kinds may lead to human extinction

Why is this?

Atheism is fundamentalism because it is saying, "If you believe in God you are a dumb ass."
Scientific fundamentalism says, "If you don't believe in Science you are a Dumb Ass."
Christian Fundamentalism says, "If you don't believe in Jesus you are going to hell along with all your family if they don't believe just like I do."
Islamic Fundamentalism says, "If you don't believe in Mohammed the we are going to kill you."
Hindu Fundamentalism says, "If you don't believe in Krishna we will think about killing you."

But, during the Crusades, the Christian soldiers point of view then was, "IF you are different than us we will kill you." So, they not only killed Muslims, they killed Middle Eastern Christians too as well as all minorities when they wiped out whole cities and killed every man woman, and child and completely looted those cities during the Crusades and that loot eventually became the basis for the European Banking system eventually.

So, because of all these kinds of fundamentalist thought and more, they lead to murders like we saw in Chapel hill when a militant Atheist killed three non-fundamentalist Muslim young people who were college students there.

This leads to my thought that, "Fundamentalism of all kinds tends to lead to human extinction."

However, agnosticism, which is "I don't know whether God is real or not" is not a violent point of view and might be the most honest point of view of all of them.

Because if you say, "I don't know whether God is real or not" you aren't trying to kill anyone for having a different point of view like you can be with any fundamentalist point of view.

So, every kind of fundamentalism might lead eventually to the end of human life on earth and human extinction because a fundamentalist point of view (of any kind) does not allow for the possibility of another useful point of view.

And in this not allowing for the possibility of anything else being true, all types of fundamentalism eventually lead to murders either directly or indirectly.

And in the end, you only need one fundamentalist (of any kind) with a nuclear weapon to start World War III which eventually ends all life on earth.