[ctdonath]

Social media sites are generally perceived as "common carriers" whom we expect no political activism from (beyond refusing illegal activity & promotion thereof) - to wit commercial entities whom we expect will not lobby (legislators nor customers) re: non-sequitur topics.

[emn13]

Well, we expect social media sites to try and avoid blatantly taking sides. But they definitely thrive on human-interest stuff (such as this), especially if it's something with a social mobilisation aspect, and that's almost bound to skirt the political rather closely. As it does here. At best you might expect social media firms to give opposing sides equal opportunities (even more business!). But even openly biased media is common - e.g. Fox news, but really many other news outlets too - and I see no reason to think social media firms couldn't evolve in the same direction.

I'm not saying we should applaud this development...

In any case, I don't see no evidence that snapchat it being particularly biased based on one story they're pushing. It's pretty much impossible to make that conclusion based on one story, given that they push so many. It looks more like sheer incompetence to me than anything else.