Opinion of the quote: "Our grandchildren will look at us...as slaveholder equivalents"

[Okay, maybe Mike Johnson is a competent parliamentarian.]

And yes, it is at the very least quite reasonable to view hunting more negatively than having consensual sex with someone other than one's spouse.  Get real. 

It is a defensible position but it should not surprise you that it violates most people's moral intuitions and thus provokes skeptical or befuddled reactions.

As for the thread question, I agree entirely with Antonio, although I wouldn't throw around the word "progress" in this context in quite the same way that he does.