Here is what I think about this.

America is not a country for people who wants to "Stick with their own".

Why Jewish people are not liked when they move to another country?

They are way too ethnic. They stick to and only care about their own.

This means they will exploit others because they naturally will see it's us vs them.

When they stick with their own. If they get into positions of power.

They are going to only bring in their own.

The other groups of people will resent them for this.

America has other groups of people here. Those that want to stick with their own.

Will end up causing things to be worse due to creating pointless competition.