I found this from the part of Wikipesija that was mentioning "controversial texts": http://forums.tokipona.org/viewtopic.php?f=33&t=836&p=3565&hilit=misuse+of+toki+pona&sid=68702b66715d2c6d346634b6f00c830b#p3565

So at least from this one thing, it seems not. It seems he translated a white supremacist text once and might have put up a banner or something. He called the text he translated racist and discredited it. According to him, he translated it for his belief in the injustice of the court system and was part of some other movement which happened to stumble upon a WS, though imo it was kinda stupid to translate that text, plus that doesn't tell anyone about solidarity against people being incarcerated without evidence if people have to head to the forums and question what the heck's going on. So certainly not avowed at least as of that post, but idk if some white supremacists do that sort of thing to have excuses or go semi-undercover or something? (Idk, the internet makes you think everyone's a secret white supremacist haha) Plus I don't know all the details of the movement or people he's talking about.