OK, here's a good piece on why ISIS should have free speech too.
There's no "court" that has jurisdiction over this. Obviously, the servers used by these terrorist organizations don't reside on US soil. Your argument is based on the premise that we need to endow the freedoms of the US Constitution to foreign terrorists organizations in the same we do US citizens.
Easy one first. No, you need to give those freedoms to their business partners who run the data centres. They may well find the material distasteful and voluntarily remove it, that is their choice.
Yes. Because I'm sure you wouldn't have a problem if the idea was that Kim Jong Un should die because he's really mean to everyone else in North Korea. So stop being a hypocrite.
Nope. Speech used to incite people to kill other people is not something free speech is supposed to protect. A line has to be drawn. Sorry.
Of course. It's not like the killers are the ones who should be held responsible for killing people... "If he told you to jump off a cliff would you do it?"
Try putting up a website calling for recruits to assassinate the POTUS. Let's see how long "free speech" protects you from having your house raided. Go ahead.
The law we have/judicial decisions != what is morally and philosophically right. But if you were careful with how you worded and actually got your day in court with a good lawyer (apparently one of the best modern first amendment counsels there is... no idea whether or not he'd represent ISIS types, though) (rather than being the subject of an
extra-judicial execution drone strike on enemy combatants) I think you'd be in with a fighting chance of being cleared. Again, IANAL.
In fact I think the US declaration if independence, which I posted an excerpt from earlier could be considered an incitement to sedition.