This is just part of an ongoing slide into the sort of factionalism that ends (eventually) in bloodshed.
The only possible reason to claim that others need to pay attention to those who would spam them with threats of death rape and worse is complicity with the intended assault. It is a leech declaring that refusal to wade in the swamp is murder.
My suggestion is that social networks ban users wherein harassment is strictly obvious, not wherein a prejudice opinion is even only implied. This is a tricky judgement call that the article tries to dissect, and unfortunately to which I clearly have little to contribute.
People should also consider that if they can't handle the vile cesspit that the internet is, using it is optional.
For another... if people you don't know are being malicious to you maybe you should step back and think about your public face. People who draw a lot of trolls do so for a reason.