As a Baby Boomer, I accepted without question that the human race wanted to last a long time and grow ever more friendly toward each other. How could I have been so blind to the fact that nearly half of all people are outright hostile to such a utopia? I joined vast numbers of others who bought into a vision of a world beyond hatred and divisiveness, unaware that the very concept fostered deeper and more bitter divisions.
The descendants of that world view continue to work toward it in spite of the continuing opposition. We dig through the muck of hostility and greed, thinking we're building a permanent road to higher ground, only to see it close behind us and grow deeper in front.
Believers in a higher power have an advantage when it comes to organizing. That's the way in which they will gather and march forth to destroy a secular society created by ethical -- but non-religious -- citizens who may come to outnumber the believers in a specific, narrow version of religious doctrine. The believers in their small groups can plan their campaigns of violence and sabotage in the name of goodness and righteousness With the stamp of God's approval they can dedicate themselves to destroying the enemies of their belief system. These enemies include religious people who believe that believers in different faiths can and should get along.
Any way you look, you can see a final confrontation brewing. Obstinacy and superstition demand it.
In the Christian tradition, God will whisk the virtuous true believers straight to heaven before the shit hits the fan. It would be interesting if this roster included a lot of people who were not scripture-waving churchgoers.
Meanwhile, in another Abrahamic religion, the self-styled Islamic State is trying to bring about their own version of the final battle, as described in an article from 2016 about the attacks to date in Europe and America.
No religious narrative has to be true for religious warfare to bring about the end of our species. Everything does happen for a reason. Unfortunately, the reason turns out to be that humans are suckers for suicidal delusions.