But as to these not being "Antifa", get real. If any weren't done by Antifa, Antifa would nonetheless cheer the perpetrators on with great enthusiasm. That's what Antifa is about. They are denigrators and destroyers of that which is decent and noble in humankind.
...fascism, as per their name?
The KKK, as in your own link?
Or currently, multiple Confederate memorials[0] created specifically "to further a white supremacist future"[1], which you ever so gingerly avoided referencing directly?
[0]: https://www.usatoday.com/story/news/nation/2020/06/01/george...
[1]: https://www.npr.org/2017/08/20/544266880/confederate-statues...
Antifa has shit on the memory of these honorable warriors--many of whom gave their lives--by defacing their monument. For shame.