You don’t get it. The folks who liked Obama or Biden were allowed to disagree with their policies. I thought Obama was wrong on letting Russia take Ukraine because it encouraged Russia. I thought Biden was wrong on stimulus checks, etc. because it was inflationary. That’s called democracy.
But no one is allowed to disagree with anything that our current president does. If you’re a college and you allow demonstrations, you can get your funding pulled. If you have a permanent resident visa, and you demonstrate against Israel for trashing Gaza, you end up being detained. This is called something else.