One way I'm trying to make sense of is the following: The left is used to being the underdog, the ones fighting for reform against powerful, conservative institutions. They are used to not really stand a chance, it's the spirit that counts. In that position, it makes sense to yell loud, provoking slogans. The people in power will laugh it off, the people you're trying to reach will hear you. But we're in a situation where there are pockets of real power occupied by left-leaning leadership. University campuses. Some parts of the media. Large cities. Certain internet communities. The people in power (who are still largely conservative) are no longer laughing, they're scared. They will use your words against you if they aren't worded well. But it seems left-wing organizers refuse to change their tactics, refuse to acknowledge they entered the mainstream arena.
I still don't get what "abolish the police" is supposed to accomplish. Everyone who bothers understands what it is really about but you don't even have to twist the words, you just have to take them literally and it's a call to pure anarchism. The "blue lives matter" bullshit could have been stopped by changing the slogan to "black lives matter, too". A comedian should not be cancelled for actual, clear-in-context jokes, at least not when genuinely apologizing. A confused college student quoting some Jordan Peterson logic (which he'll likely feel embarrassed for in 5 years without any outside help at all) should not be yelled at in public or you get that shit on Tik Tok as "lefties suppressing free speech". Don't call your work reform movement... "anti-work". Sigh.
Laugh at right-wing stupidity. Take left-wing politics (i.e. European conservative politics) seriously and consider how to implement it in the real world. Do what the right has been doing for centuries, learn from it. They're in the defense now. And the most powerful move on the offense is appearing calm and composed.