Multiple reasons: Musk spent a bunch of time bashing twitter's moderation efforts pre purchase. He's then spent a bunch of time mocking advertisers' wish for brand safety [1]. He chased that with calls to harass advertisers who stop advertising on Twitter [2,3].

For context, Twitter has never had a particularly compelling ads product. Like it or not, both FB and Google have super compelling products: the best (by far) tracking, targeting, cross-device linking, or intent. eg Facebook could match your user across devices, browsers, and apps; and allowed ecom targeting by phone or address, not just pixels or cookies. Google has a near-monopoly on the highest-intent ads next to their searches. That's why, in 2021, Google earned $209B from ads, FB $115B from ads, and Twitter < $5B from ads.

Add that up with Musk's ... compelling offer to whip his followers into a rage at you if you, say, reduce ad spend allocation to Twitter in your quarterly ad rebalancing, and it's not hard to see how we got where we are.

[1] https://twitter.com/elonmusk/status/1587899771091566595

[2] https://twitter.com/elonmusk/status/1588676939463946241

[3] https://twitter.com/GoAngelo/status/1588696580709924866

It's about looks more than it is actual violence. This is advertising so that's not throwing shade, it really is actually about looks. It's also about actual violence, but looks here are very important. And it looked like Twitter was doing something about the violence. Maybe not 100% successfully, but they were trying, and officially disavowed doxxing and violence.

I was at many of those protests, the attempts to "burn down" a federal courthouse were laughably inept. The cops WANTED the protestors to get farther on it than they did, I talked to a group of about 12 cops the night the march went to the Mayor's house (completely peaceful march, camp set up outside his townhouse pied a terre, no violence or property damage that I'm aware of). Those cops were LIVING for the idea that they might get to brutalize a bunch of protestors for actually posing a threat to the Justice Center. But the people attempting to do so were, uh, not very good at it.

I've lived here for 23 years and been an activist intermittently through the years. The activists/antifa here are not the supersoliders the press, the cops and the mayors make them out to be. They're mostly street kids, crust punks, well-meaning college and grad school students, some hippies and autistic communists. Not an invading army ffs. Just folks. Also, Andy Ngo is a fascist bootlicker pissbaby loser and his followers are Nazis, so you can fuck right off with that "attempted murder of a gay immigrant journalist" tripe you're selling.

You might want to examine your priors. What if the issues you see as symptomatic of wide-spread left wing violence don't look the same way when when considered in the cold light of maximizing advertising dollars?