If you don't understand why "social justice warrior" is an insult, you don't understand irony. Social justice workers oppose war.
It is impossible to believe in the goodness of humanity and read the comments.
Dear socialists, do you support Bernie Sanders or someone even less likely to get any attention from the media?
Also, what evidence is there for the sheepdog theory that supporting Sanders is only a way to sucker socialists into the Democrats' camp? It doesn't work in my case: I plan to support Sanders for as long as he's running, and then I'll support a socialist or another promising third-party candidate, or maybe I won't vote, though I continue to think that so long as there's anyone on the ballot who you like at all, you should vote for them, no matter how hopeless you think their odds are, because while it's very true that the US's two parties are controlled by billionaires, only our votes for third parties say we want more choices than two.