Other examples where "Just integrate, problem solved." is extremely offensive.

https://en.wikipedia.org/wiki/Jim_Crow_laws

https://en.wikipedia.org/wiki/Apartheid

https://en.wikipedia.org/wiki/Canadian_Indian_residential_sc...

Not to mention that "just integrate" might mean abandoning your faith, language, customs, way of life etc.

Especially for Jews in Europe that would have meant abandoning their faith at a minimum.