There is no way to concisely answer these points but I can point you in the right direction on where to look.
1. White is european heredity. Race never has been skin deep. The Tabula Rasa concept - that all creatures including humans are born as a blank slate - is patently false. We are created with a limited genetic knowledge and genetic predispositions, that is, a similar unconsciousness to those of our race. Culture is a mass manifestation of these underlying unconscious similarities. Small tribal differences may occur but when comparing a white to an african black, pacific islander or chinaman, the physical and psychological divergence of both the mind and the body are so different that a truly honest scientist would classify each as a separate species.
Some differences to research:
racial IQ levels
racial crime stats
how societies only accept religions that already mesh with their genetic culture, or modify them to do so
2. Look into the benefits of tribalism, high-trust society (1950's USA) vs low-trust society (Detroit or any other shithole), near-universal self-segregation even in modern US cities. There can be no unified state. There will always be superiors and inferiors. The injection of non-whites into white nations is done specifically to weaken them.
3. You are experiencing selection bias. You are basing your general view of the topic on a small group of outliers. Read up on the Bell Curve. If one only ever encountered white people with Down Syndrome, would it be wise to form a sound opinion on the general population from that selection sample? Substitute Mensa members and re-evaluate. Averages exist for a reason.
4. You didn't put a 4 but I'm going to crack the shell of the Jewish Question for you, since this one point is what kept myself from taking many claims seriously for many years. There is no grand jewish conspiracy. There is no cabal of puppetmasters that clandestinely meet in the basement of a synagogue once a year to decide the fate of empires. The supposition that everyone critical of (((the tribe))) is a crazy conspiracy theorist nut is utter nonsense and their most powerful weapon against the truth. In the same way that whites are, by their genetic nature, moral, thoughtful, altruistic, considerate, high spatial intelligence, low time preference, K-selected, trustworthy and productive, the jews are by their nature deceitful, slovenly, selfish, parasitic, covetous, untrustworthy and with the high verbal intelligence to justify themselves through semantics.
Watch The Greatest Story Never Told, even with a skeptical mind, and then apply Occam's Razor. While doing so, be cognizant of the fact that you have been indoctrinated and conditioned since elementary school to experience Orwellian "thought-stop" at any criticism of jews or the traditional holocaust narrative. That is, you literally stop thinking about it to avoid committing thought-crime and dismiss the source of the cognitive dissonance out of hand. Now that you know what to look for, you WILL catch yourself doing it, and not just about the JQ.