>it has some pretty racist/right wing garbage posted
Did you examine Twitter rules on "hateful conduct"? [1] If some tweets break the rules just report them, hopefully Twitter will remove them or suspend the whole account.
[1] https://help.twitter.com/en/rules-and-policies/hateful-condu...
What you are talking about is a "Reputation doppelgänger". I could retype the advice found in this article but probably best to just share the link ;)
https://www.business2community.com/online-marketing/same-nam...