"2) What exactly does "otherwise" cover in the law...does "otherwise" cover everything. "

Wow. Not sure I've ever met anyone who didn't know the meaning of the word otherwise. It means the government can't compel any speech, whether political or not. Now are you going to ask me the meany of "any" and "not"?

"3) You told me two days ago the Baker cannot be compelled to make a political statement."

No, I said political OR OTHERWISE. How many times will that have to be said for you to grasp it? The government cannot compel ANY speech. Is that clear enough for you?

"that is why a black baker cannot discriminate against a skinhead"

Wrong. Skinhead is not a class of person.