Is there "real" proof that apes turned into humans? Agreed, evolution does happen, but what is a missing link?

Micro-evolution (adaption) can be a repeatable, demonstratable, 'fact'. All else like macro-evolution takes a degree of faith.

You are absolutely correct; 2+2 does equal 4. This is one of the immutable facts which make up many of the theories in mathematics. One particular species of white British butterfly evolved into a black butterfly during the industrial revolution to help it hide from predators when the whole landscape was turned back by the smoke from the industrial furnaces (it even became known as the Black Country, and still is).

This is one of the provable facts about evolution. Neither our simple sum nor our change–colour–or–die butterfly, on its own, can prove Einstein's theory of relativity or Darwin's theory of evolution, but they are one of the many facts which stick together to prove the entire theory. Of course experts on evolution will argue about the fine details of how it happened.

That is the way science works. It's not a weakness to not understand everything about a theory. A theory is a work in progress and always will be.

A theory is not a scientific fact (although if the theory is robust enough to withstand any challenge from any competing theory, it can be treated as a fact). But only a fact that can be proved, tested, and reproduced can become part of the theory.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.