There are just so many instances of left-leaning politicians inciting, encouraging, or supporting criminality, that there's no defense for the one-sided enforcement of moderation by Facebook, Twitter, Google, Amazon, and the rest of them. I have a list below of articles I dug up from just two minutes of web searches. There are substantially more instances than just these as well, but none of these people are banned, nor is their content censored. We see the same one-sided enforcement with fact-checking, which has been slowly degrading into partisanship as well. These days I often see fact checks with the label "missing context", that aren't really a "fact check" but cast doubt on a claim typically from a moderate or right-leaning voice.
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All the times Democrats used the word "fight": https://nypost.com/2021/02/12/trump-team-plays-videos-of-dem...
Chuck Schumer (and others) inciting/supporting rioting at the Capitol during Kavanaugh's confirmation hearings: https://thefederalist.com/2021/02/03/chuck-schumer-used-viol...
Democrats claiming the 2016 election was stolen and inciting violence against Trump: https://defconnews.com/2021/01/11/all-the-times-democrats-in...
AOC justifying rioting: https://twitter.com/AOC/status/1334184644707758080