So what's not "open to discussion"? It seems like fundamentally everything about this election has been open to discussion, it's been a weird fucking election. Are you literally saying supporting Trump is a crime so bad that it's not "open to discussion"?
"The line tends to shift as society progresses." You talk about this "line" as if it's a real thing. Let me pose a fairly obvious question, in almost any time period, who imposed the limits of "what is not open to discussion", and what were their motives? Keep in mind, things that are obviously true don't need to be "not open to discussion", because nobody is bothering to discuss them.
I'm serious. I don't have a good answer. I think it depends on the issue, but I know people are going to draw their lines differently. Thoughts?
I merely wanted to give an example of what happens when there is a shift of the line and some people haven't caught up.
Not so long ago it was a perfectly valid opinion that there should be slaves. Try that today.
(Incidentally that same level of society would have seen Thiel stoned to death, he is openly gay after all)