I see it exactly as those members on this forum who insult and curse the players and the board and the managers.
It is different, insults are different than physically hitting someone.
They show their middle finger to the players in the Juve bus. If there's one thing that I'll never do, is to show my middle finger to anything that has a Juve logo on it.
Also, cursing players on the forum does not harm them, but if you wait outside for the players to curse and yell at them, that does have effect. But the players should have set an example on behavior instead of showing the fans a middle finger or silence gestures when booed.