This is part of the political divide I'm talking about. There were a lot of people who were left leaning who became disillusioned with the democratic party after what it did to Bernie Sanders and the ideas he represented. The whole party, and the whole political left seemed to split in two after this.
After the Democrats forced Hilary into the nomination, it did enough damage that Trump got in,
but instead of owning up to it, they doubled down endlessly. ie, we are perfect and did nothing wrong, and the whole country are just far right racists and that's why we lost.
Many of those Bernie supporters had nowhere to go after the Democratic party decided it stood for the moneyed interests rather than the people, and a chunk of them still have nowhere to go. And those people, the ones who can't stomach the democratic party, but aren't actually right wing, get lumped in with the actual right, and then called far right.
A fair few became democratic zealots over time because of how much they hate Trump, but a lot still have nobody that really represents them. To bring it back to the topic at hand, it's actually quite a small group of people on the far left who want Twitter to censor everyone to the right of them.