They did not ban Trump for "continued calls for violence and election interference".
Look at the two Tweets they used as a justification of his ban [1]
> The 75,000,000 great American Patriots who voted for me, AMERICA FIRST, and MAKE AMERICA GREAT AGAIN, will have a GIANT VOICE long into the future. They will not be disrespected or treated unfairly in any way, shape or form!!!
And
> To all of those who have asked, I will not be going to the Inauguration on January 20th.
Of course, in the blog post, Twitter claims to have "assessed the two Tweets referenced above under our Glorification of Violence policy"
If those two tweets are glorification of violence, then your post is calling for genocide.
Again, if those were all he’d posted and his followers hadn’t just responded to his past calls with a violent assault on the election process, he’d never have gotten banned. As you can see by reading the page you linked, this decision was made with that context in mind after years of crossing the boundaries, and they did not want their corporate resources potentially being used for additional political violence.
The problem is their claim was those two tweets were violent. If they just said they banned him for behavior outside of Twitter they wouldn't be lying. Instead they claimed two tweets that have literally nothing to do with violence are violent.
Look at the two Tweets they used as a justification of his ban [1]
> The 75,000,000 great American Patriots who voted for me, AMERICA FIRST, and MAKE AMERICA GREAT AGAIN, will have a GIANT VOICE long into the future. They will not be disrespected or treated unfairly in any way, shape or form!!!
And
> To all of those who have asked, I will not be going to the Inauguration on January 20th.
Of course, in the blog post, Twitter claims to have "assessed the two Tweets referenced above under our Glorification of Violence policy"
If those two tweets are glorification of violence, then your post is calling for genocide.
[1] https://blog.x.com/en_us/topics/company/2020/suspension