You can easily find tweets calling for trump and republicans to be killed on twitter from years ago and nobody bothered to ban those people so your statement rings hollow.
Given were talking about the trump ban I'm not sure it is, he was banned, countless antifa accounts calling for Andy ngo's death were not.
There is a clear double standard, pointing that out isn't whataboutism it's simply calling bullshit on someone using the incite violence argument to say trump should stay banned.