I can't think of a single example of anybody disagreeing with me in my ten years of talking about Zen on social media.
It always boils down to one of these:
Ignorance: People have not studied a subject's history or history generally.
Disinformation: People knowingly try to substitute religious doctrines for historical facts.
Agnotology: People deliberately remain ignorant in an attempt to avoid facts.
There aren't significant disputes about facts and arguments at all. Ever.
It all boils down to ignorance, disinformation, and agnotology.
Interestingly, Zen culture in it's own written history, has zero interest in these topics. I don't know... maybe ignorance is a more Christian thing? Bible in Latin internalized into the culture?