To be honest, I am not sure Iran would want to target Trump at this time.
Yes, Trump is an anti-muslim bigot who is going to side with Israel and try to "attack" Iran (such as when he scuttled the Iranian nuclear deal). But what better way to garner international sympathy than to be seen as the "rational" country while your opponent is running around alienating all their allies with stupid trade wars and threats to withdraw from NATO.
If your enemy wants to shoot themselves in the foot, don't stop them.