Religion and other forms of tribalism have most certainly caused many wars. In other cases where it doesn’t, it can be used as the justification. Resources are also a big cause.

Many of them...
But it is always about power, influence and money...

Absolutely, Positively without a doubt if you are a student of History. History requires a lot of reading by different authors or credibility that leads you to other authors and persons of the same era.
I got started on the Life of Gen. George Patton whom I never understood but having seen the movie and having read the Bio's of Eisenhower, Mac Arthur found Georgie was the most interesting and logical on how to win a war.
Being a Veteran and having some understanding of how FU'd the Military can get with its rules and regulations which cost more lives then actual combat will tell you that Patton won WW11 in Europe which if it had not fallen Japan would have never surrendered.
The irony of it all is that both country's are our most closest allies in every way. Patton warned us about Russia, and Mac about Korea an Viet Nam.
I may also need some input to this but Viet Nam is like 90% or more Catholic. I also remember reading that the Tenets of Hitlers SS was taken from the Jesuit Order. If anyone would want I will go back and research my findings which I recollect but do not have the books at present on my mind.

Absolutely

No.