

That’s coherent. Unfortunately most people who use it today literally mean “someone who disagrees with me.” It really muddies the water because it’s often accompanied by threats of violence. The net effect is raising the temperature in the room on both sides, because it’s effectively dehumanising others who have perfectly valid political disagreements, and calling for their death.
I’ve had exactly the same experience. Lemmy has been far more hostile than I ever experienced on Reddit. Any opinions which aren’t far left are called “Nazi,” and users are very quick to justify violence against “Nazis.”