I know of cases (you can google them as I don’t have the time now, sorry) where attempted prosecutions have taken place. I have not followed the cases, but does it really matter?? It’s a very small step from a law such as this one to “You incited violence with your words and caused someone to commit a hate crime with your words” - and yes, we are already there and have been for some time!!
By inciting violence do you mean actions such as falsely Shouting fire in a crowded theater?
Words that are likely incite violence are not protected by the First Amendment and have little to do with any hate crimes legislation.