Yes, label people to dismiss them. "They don't agree with me, they have TDS and can be ignored!"
That's true and universally so. Just look at labels "Liberal", "blue haired", "MAGA", "deplorables", "Never Trumpers", "DIMs" and my favorite "NAZIs".
I have given up on current sloppy usage for legitimate concepts of "liberal" and "conservative", turning them into insults.
"MAGA" is a self-label, borne proudly by its community.
"Deplorable" was a politically-stupid label applied to a similar community that backfired.
"Never Trumper" is a literal (somewhat obsolete) term for people who oppose Trump strongly.
I haven't seen "blue-haired" recently, nor "little old ladies in tennis shoes".
"Nazi" is an historical term with a curse on it, but reading about German history in the mid-1930s is useful.
However, I am unfamiliar with "DIMs": is that an insult for "dim bulbs"?