I guess maybe humans really are inherently evil.
That is one of the basic tenets of the JudeoChristian worldview. It's why we need a Messiah. Thankfully, One died to save us, and if an individual repents of his or her sins and asks Jesus to lead his or her life, the individual can escape the spiritual death that is the just reward for all mankind, were it not for His atoning sacrifice.
“I guess maybe humans really are inherently evil.”
Yes, they are, but God is sovereign. His will be done, and He has promised to save His people. The remnant will remain.
As for predictions of the future, they’re all bunk. The birth rate for Muslims is also declining, which is one of the reasons the imams are all frothing at the mouth about spreading their false religion.