The US has always had this exclusionary divided culture due to its diversity and racism. It makes it hard to fix some of the larger issues that exist, since much of the debate is framed as "us vs them".
You can see similar issues in countries like Malaysia, where the parties are mostly split on ethnic lines.
This isn't excusing this behavior at all. Just context.
Roma were literally being sent to death camps to be exterminated throughout much of Europe 75 years ago.