There's one extremely important nuance here people are skirting over. Facebook is not "enabling" e.g. mob violence in India. It's not even the internet "enabling" these things. These acts existed long before the internet. All the internet has changed is allowing people to organize into these groups more easily. How is this related to Facebook? Well they're organizing through Facebook (or related properties) to do these things, yet it's clear that Facebook is not the a priori cause here. We still might want to declare them guilty as a facilitator rather than an enabler, but I'm not sure how reasonable even that is.

In particular there is no specific company necessary to communicate or connect on the internet. There are even fully decentralized messaging programs that operate independent of anything besides an internet connection. The reason it's easy to blame Facebook is because they are a net ill on society for many reasons aside from the ones being discussed here, they have a founder that's both remarkably visible and remarkably uncharismatic, and they or related properties are one of the most common methods of organization simply because they have, by a wide margin, the greatest marketshare of all means to organize.

But I think blaming Facebook for e.g. mob violence in India is akin to blaming the Bell System (which held a monopoly on telephone connections from the 19th century until they were broken up in the 1980s into AT&T, Verizon, etc) for e.g. the KKK organizing through telephone calls. In other words this a people problem, not a company problem. You're not going to solve this through some sort of content filtering or clever algorithms. I have absolutely no love for Facebook, but I think turning them into a scape goat for any social ill is hardly productive. It means you're going to spend all your energy shooting at one target that has nothing to do with what you're actually aiming for.