Are you sure? Stupidity is always was, and always will, so as radicalist blind stupidity. Religions, political and ideological agendas tin foil hat theories? Won't matter! these kind of nutjobs are interchangeable, and susceptible any of it. The sad truth is most of the humanity in this matter are a sleep walker sheep in this matter.
If communism, socialism, racism, any and all religions disappear, alongside with the absurd pseudoscience and conspiration theories disappear? They still going to find something to use up as an excuse. Some of them because of blindness, others because of one, or other personal reason. You unite humankind under one nation ideology or religion? What's makes you think this will works out? There was ever peace between christian nations, or islam, even from the same sect, Or communist democrat, / whatever reason? Some people just need to fight, for whatever reasons they get what you going to do with them?
Forget about religions, and ideologies, they are just the symptoms something much more deeper and sinister.
Complicated matter i just starting to realize it.
Stupidity, violence, herd spirit, plotting and scheming against / for each others, Selfishness, selfish petty wickedness, selfishness the abberation(twistedness) of emotions and good ideas, conception, it can be specified at all day!
But all of this comes down to this things
We just don't know how to do things right and wrong? And if we learn it someone teaches us? Someone else going to twist it, and what's even worse, We are just way to stupid to our own good compared to the powers and knowledge what we have in our disposal.
And the few who is not? And even amongst them the very rare ones who can see the real problems in an extend?
What they can possibly do?

[sad] Some improvement is possible, but? Truly? This is a windmill fight in an ever changing landscape.
And we are just way too stupid to see even this!