Yes but if I recall correctly, there were people in the replies of this tweet asking if she meant what she said and she gave a response that implied so. She also had enough time since she sent the tweet till now to clarify that she did not want any actual harm upon Vic (which to my knowledge, she has not done). Hence, I think if those two conditions are met, then her defence is fucked. Even if you meant it as a hyperbole, that fact that you did not issue a statement that you do not condone violence against him is a clear indication that you wanted people or were directing people to go after him and try to physically harm him.
It's not very stable, but I'm pretty sure they could go with that angle given conditions were met