Bet fold flop, against a range of ahkh,khqh,khjh,jhth,qhjh,9sts,9ctc,9dtd,9hth,66,77 ,88,7c8c,7d8d,8h9h you have 22,24% equity, and in my experience this is not a spot where villain is going to spew it off with a hand like 99-jj but if he would you have 46% equity but you wont see those hands often enough to get it in here.
As for your question a fold is always justified here.