If you mean that it's wrong for the POTUS to go around groping and sniffing children and young women against their will then yes, you're absolutely correct and I agree with you.
You mean "grammar"? I guess your forte is not spelling. It actually would work as a singular or a plural noun as Biden is the Biggest Idiot Democrat Ever Nominated as well as Biden is the Biggest Idiot Democrats Ever Nominated.
No, I don't as I think there are two equally correct nouns to use in this particular instance but it ok if you prefer yours. After all, you are God and I am not....