[alt text: a text-and-image tweet by @NotHoodlum on Twitter. The tweet shows a picture of U.S. Representative Marjorie Taylor Greene. The text of the tweet says: "Marjorie Taylor Greene has been hated by the left for years and never feared for her life. She's been hated by the right for two days and had to hire security."]
This sounds like no true Scotsman logic. But irregardless, there are examples of folks who were associated with the Democratic Party conducting political violence, for instance Ryan Wesley Routh. I'm not arguing that there is the same level of political violence of both sides but framing political violence as a partisan issue is not helpful.