Not to mention the fact that Notch hasn't actually been involved with Minecraft since around 2014 anyway, and Microsoft has basically cut ties with him after he started saying stupid shit.

Dozens of reasons why this is stupid, but this is what I want to point out…

This guy already bought Smash Bros, so destroying the game only hurts himself.
Since Steve is DLC, just DON'T buy the DLC: that way you are physically impacting Nintendo by showing your disinterest compared to any other DLC you do buy.

Not to mention this guy is bashing Nintendo for being racist, sexist and transphobic? Really?
Okay yes, Punch Out is dated. However Min Min's inclusion in Smash was quite audacious since she is the first Chinese character included, which was somewhat risky to do since there has been a lot of anti-chinese racism in recent years; also, Nintendo's mascot is Italian despite being a Japanese company.
As for sexism… really? Samus is one of the most badass characters in all of videogames, becoming an icon of strong female characters. Not to mention that Smash is full of gendarswaps skins.
And while Smash itself doesn't have many trans characters, it does have to be noted that Birdo was introduced in the 80s: a time where having trans characters in children's media was both uncommon and not popular.

So no, Nintendo are not Nazis for including Steve. Just another snowflake melting down.