Because in it's best interpretation, "globalist" is a thinly veiled insult for "person even slightly more liberal than I am, who I don't like," even though if you look up the actual definition, everyone with a functioning brain should be a globalist:

> noun a person who advocates the interpretation or planning of economic and foreign policy in relation to events and developments throughout the world.

I don't know many people who think we shouldn't take world events and developments into account with regard to our economic and foreign policy. So any time someone uses globalist as an insult or pejorative term, I have to wonder what they really mean. Because it's always code for something else.