Tumblr has become so left wing it has actually looped back around is coming close to a weird right wing conservative mentality that everything you personally think is right and anyone who disagrees with you is wrong

I think what you mean is that there has been a growth in dogmatism. 

Dogma is not a purely right-wing phenomenon and usually stems from competitive bandwaggoning, when people want to show they are so on board that they are willing to lash out at perceived enemies to prove their devotion. Often the most dogmatic are compensating for a lack of understanding and so tend to spread a confused version of their chosen message with extreme zealousy and force.

It takes a lot for someone to impress me with vernacular alone, but this response is also fucking incredible.