Ah yes, because Trump is *now* gone, let's just ignore the pernicious influence of thousands of BS Trump tweets over 4+ years (starting with the birther hoax see above) including hundreds of Tweets specifically pushing the election fraud lie since early-November, which culminated in the carnage we saw on Jan. 6.
@RealDonaldTrump is now a blank screen, but the damage is done and it will all be archived in the Trump Presidential Library for future historians to peruse and cringe at their leisure if and when that monument to American proto-fascism is ever built.
Purging his Twitter account 2 weeks before he left office barely helped, but it does belatedly put Twitter on the right side of history.
In fact, Twitter CEO Jack Dorsey resisted calls to ban Trump *even after* Jan. 6, but the internal pressure was too great. He would have faced resignations, increased criticism and scrutiny, possible liability if there was even more bloodshed, etc.