[generj]

The Nazis didn’t start by massacring ethnic (and political, sexual, and religious) minorities. They started by massacring mentally handicapped people.

But then they made noises about getting rid of undesirable people by shipping them out of the country. Prior to that plenty of dehumanizing rhetoric that Trump and others eerily echo. It was only after the forced deportations didn’t pan out that ghettos started. Then detention camps. And finally extermination centers.

It’s very reasonable to look events which appear similar to the start of genocides and decry them.