It doesnt take that. But the far-left rarely insults people with racial slurs.
No, they prefer to use words like nazi, facist *phobe, which most likely won't get anyone banned, expect the target of those insults
Its just that coorporations are far more scared of beeing associated with the right, than the left.
Legally speaking you're not allowed to insult anyone, wether as a n-word, nor as a nazi
This is absolutely false, at least in the US where Patreon is based. Out of curiosity where did you get the idea that insults are illegal (assuming you're talking about the Unites States)?
Calling someone a nazi when you cannot proof that they do indeed follow that ideology would also be slander/libel.
Someone tried to sue for calling someone a Nazi but lost [1]. In this case the defendant claimed to have been presenting a hypothetical. I have not been able to find a successful defamation case due to someone being called a Nazi in the US. Not to mention it wouldn't affect calling a black person a n____r because such a statement is not factually incorrect (as the slur is a derogatory term for a black person).
1. https://www.google.com/amp/s/www.thewrap.com/james-woods-bea...
For left leaning people it takes doxxing and instructions on how to commit acts of mass violence to get banned.
For the opposite ends of the political spectrum people have been banned for months-old videos - not even on a channel that the banned person runs - in which someone uses a swear word to tell the alt-right that they "are acting like n_____s" (which I interpreted as a deliberate word choice to emphasize irony that the alt-right is behaving how they often portray and see African Americans. Sargon's explanation is roughly similar). Meanwhile there are plenty of people who use the same slur regularly, some even in the usernames of their social media profiles. There is zero doubt in my mind that Patreon decided to ban Sargon on the basis of his political views first, then searched for something to justify the ban.
These are hardly the same situations.