The issue is that a fair reading is not being applied evenly. Twitter interprets "To all of those who have asked, I will not be going to the Inauguration on January 20th" [0] as a call to violence. That isn't even close to a fair metaphorical reading, and it was probably meant literally.
[0] https://blog.twitter.com/en_us/topics/company/2020/suspensio...
You can argue that's not fair to Trump, and don't pretend his accounts were banned for the literal meaning of the words, when the post you linked to makes clear the thinking behind the decision.
At that point, you wouldn’t be able to say the video game was not a cause. This is not blaming Trump for abstract violence in general, but for specific violence that he called for actually happening.
It is not a perfect system, but I think banning based on result is not an unfair system.
I’d say that Trump’s calls to violence are pretty credible.
Has Twitter been made aware of this person and won’t suspend their account?