But the answer is: "Yes, you could be responsible."
The point of the comparision was to elicit a further justification that the speech should be illegal. Can you justify it?
But they still got 4 years in prison.
Well, there are definitly some different sensibilities between the US and the UK regarding free speech. To any extent that someone should be imprisoned for something like that should be because they were orchestrating the riots BY their speech, not the speech itself.
Someone saying, "I am outraged! We should riot!" should be protected speech.
BUT if objects for gratitude and admiration are our desire, do they not present themselves every hour to our eyes? Do we not see a fair creation prepared to receive us the instant we are born --a world furnished to our hands, that cost us nothing? Is it we that light up the sun; that pour down the rain; and fill the earth with abundance? Whether we sleep or wake, the vast machinery of the universe still goes on. Are these things, and the blessings they indicate in future, nothing to, us? Can our gross feelings be excited by no other subjects than tragedy and suicide? Or is the gloomy pride of man become so intolerable, that nothing can flatter it but a sacrifice of the Creator? --Thomas Paine