Yes, you CAN say that, but you can't advocate for it, or propagate for it, or incite people to do it.. that would be illegal in most countries.
Also, keep in mind, just because actions are not taken against someone who promotes that, doesn't mean it's legal.
usually actions are only taken against people that are high profile.
anyway, on topic:
a few months ago, everyone were protesting the idea that twitter will now have a committee, controlled entirely by lead SJW figures, to monitor twitter users.
we now see the results of that.
obviously twitter is not a place to express and trade opinions. and i really hope people still stop using that shit site and move to something else.