discrimination doesnt start with "suggesting bad things about a group of people", it starts by creating such a group of people, and enforcing it, culturally, politically, socially and at every level (including by jokes, memes, etc.). then at some point in history when society will be tense enough and on the verge of collapse, there will always be someone to suggest that this virtual "group of people" is the cause of... you know... everything bad.

but discrimination starts way way earlier. when making "groups of people" based on things they didn't chose, and that actually shouldn't matter so much...