The developers who created Lemmy are leftists, and they run the lemmy.ml instance. The lemmy.ml (.ml is for Mali, btw) domain was allegedly chosen because ML can also stand for Marxist-Leninist.
I’m not an expert on the subject, but lemmy.ml users are known for being tankies. People don’t like that.
However, some of you whipper snappers don’t know that those of us with really old accounts joined back when lemmy.ml was the most popular instance. I just like FOSS things.
Edit: added “allegedly”
I cannot support an instance where criticism of countries like North Korea or Venezuela is sanctioned with 30 day bans, even defending the Russian invasion of Ukraine is tolerated. I love open source software and it breaks my heart, but I completely blocked .ml after multiple incidents I witnessed or was part of in the news and worldnews communities.
Also I cannot really understand the argument of having an “old account”. All it means on Lemmy is having a year and a month in your profile. It is even a good idea to switch your account from time to time to stay more anonymous.