this isn't bvb non-sense because villain doesn't know what bvb is
but you're putting him on a super strong range
I think A4 is in his range too because fish love to call the flop ace high especially if they have a gutshot
he could possibly have something like 3c4c/7c6c
his bet sizing kind of looks like a draw or the nuts
if he raised smaller he'd actually be more likely to have the nuts
I mean it's still a fold, I just disagree with your ranges you can't put people on the nuts 100% of the time