They should, and many do. Once you start peddling in calls to violence against people, no just ideas, then you should lose access to your platform and well deserve to be investigated.

Being complacent with these things gets people killed. You can have free speech all you want but are also responsible for what you say.

Free speech doesn't mean you get a free pass without consequences.

except their efforts are largely focused and selective

switch to arabic language and you will see things that could be easily identified as violent propaganda,yet they stay up because FB censorship system is not interested in enforcing rules in that sector

from what i hear its pretty much the same for India