Baloney. I’m willing to bet that Hindus, Bhuddists, pagans, et al, throughout the years denied Har Sinai.
Again you are arguing with Rabbi Miller,tzl, who is the source, as you know for much of what I say. As you know in addition to being a true Godol, he was a recognized expert in Jewish History and published a few books on the subject.
But in any case I’m surprised at this style of argumentation coming from such a distinguished Debator: “I’m willing to bet”!
I hope that wasn’t an ad homineum (or whatever it is) attack.