system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Whats going on between Tumblr and 4Chan?

I don't use tumblr or 4Chan but people on Imgur are flipping out over something between the two having a "war".
gpt
Tumblr is filled with SJWs (Social justice warriors). 4chan is filled with trolls. 

I dunno who fired the first shot, but the basic gist of it is that there are two communities of similar hateful personalities with polar opposite political and social beliefs going at it.