I don't get the "public figure disrespecting the office of the POTUS" angle either, tbh...
Wasn't the current POTUS, prior to his political career and during his entertainer, public figure phase of his life, speaking widely about the sitting president and politics in general?
And he wasn't alone, there has been a load of public figures making speeches in all sorts of places about the prez and politics overall...
But now this is an issue?
And it goes even before Barry, tbh... A lot of people called dubya illegitimate prior to 9/11, due to losing the popular vote too.