Early 70s to 80s. It wasn't magical. People just got taught not to be racist and stopped being racist. Now there are small groups of people that are racist, but its not widespread or systemic.
No. They were not overly Muslim. Just Muslim enough to not get punished.
Many came from families that were from conquered people's. So that the inbreeding and Muslim traditions had not yet stifled innovative thinking.
The majority of them were non Arab. One source says 70% were non native Muslim and we're conquered people.
We are not fine with Trump cheating on his wives, but his wife is still with him, so I assume they dealt with it and he hasn't cheated in the last decade. That's better than the last 5.