About 22,5% of Germans are first to third generation immigrants. Not even the people who don't want more immigrants generally hate immigrants - certainly not you individually. Since there's comparatively little "segregation", with immigrants and non-immigrants having attended the same schools and living in physical proximity, you will be hard-pressed to find people frothing at the mouth at the sight of someone who looks like an immigrant.
One thing that is true however is that Germans will expect you to act German when you're in Germany and you'll be treated like anyone else for better or for worse. There's no "immigrant card" you can play. Complaining about other's behavior - often to their face - is a very German past-time. At least if you fuck up you'll know, because Germans will tell you about it at length. God help you if you screw up the same thing a second time.
Ditto on the immigrants thing though, Germany is certainly not the worst country in that regard.
Currently, the max on public insurance is about 800€/month incl. „Pflegeversicherung“ for when you need permanent care after injuries or old age. You‘re paying half of that, your employer pays the other half.
There‘s also tuition at universities but it’s not comparable to US universities. I don’t know the current level. It was the equivalent of around 100€ per semester when I was a student.
Even if you have to spend $2000 for a two-bedroom flat, if you earn $150k/yr you are likely able to save more money than someone earning €50000 with a €500 flat.
(I am not saying SWEs are underpaid in the EU, if anything it is still an absurd amount of money compared to people who add real value to society, but there is certainly a stark contrast)
(I am european with a MSc and have never paid for education, do not have a car, and am very happy with most of the social security programs. I only tried to see things from another point of view)