hand 1 - if you want to felt, 3bet and dont fold. if you don't think your hand is good enough to felt, flat-call and play a flop. someone who is so nitty seems like they're going to be really in jam/fold mode when faced with your 3b. if you think your hand is good enough to get in vs what you think he jams with, by all means 3b/call it off. if you think he only jams better, flat his open and make yourself some postflop $.

as for hand two, is this the same villain? or is it someone else for whom you forgot to include reads/stats?