No, it's an excuse to pirate games.
If you play this game you should support the work of the team (including one of the creators who may have posted things you don't agree some years ago) you should buy it because it isn't F2P. All games are the product of several people working hard during years, so they deserve to be paid for the people who use their product even if we don't like their opinions on something.
If you don't want to support them, simply just don't play the game. I wouldn't care about these tweets, because everyone has their own opinions, if we would agree in everything we would be robots or would live in a dictatorship instead of being free human beings.
Devs and companies typically try to be politically correct to avoid this kind of things so most of them don't share their opinions publicly about different potentially controversial topics like politics, religion, etc. And if they do is to be politically correct or (like Rockstar or Devolver) cool with something acceptable by the majority and still mostly politically correct.
If all devs (like any other person or company) would be open and transparent with their personal opinions, make sure you would disagree with almost everyone, especially if you go to check all their social media posts until many years ago.
His opinion about gamer gate made sense at the begginning because it started as what he said. Maybe 3 years ago, when he tweeted this, it still didn't derailed hard into mass harassing. There was a lot of people in gamergate and it covered many topics. Some were about ethics in gaming journalist and others were harassing people.
In any case, according to the 3 years old tweets the guy of this game only had an opinion about gamer gate, he didn't harass anyone.
He is the one being harassed and boycotted one right now for having had an opinion 3 years ago that wasn't politically correct.
Regarding gamer gate targetting people because of their sex, gender, race or ideological positions, I think the reason should be somethine else, because -at least what I saw on news or social media from time to time, I didn't follow closely gamer gate- the targeted people were always the same few individuals. And there is a lot of people in the industry with this sex, gender, race or ideological position that are more well known that the harassed ones and weren't harassed.