ok. Villain is 3-betting, not just opening. 3-betting at 50nl on FT is rare (d0zer, back me up on this one).

Even after 30 hands you have a read that villain isn't super-aggro pre. Most (seriously!) people here with pfr <12 have a 3-betting range of AA/KK/QQ/and only occasionally AK. That's it. Forget position, forget isolation.

So, even if 30hands is a small sample size, it's unlikely that villain has a broader than standard 3-betting range. So if op is lucky he's 50-50. FWIW, I usually 3-bet QQ, but only rarely 4-bet. Think about it, if villain had a full stack then what is the advice. Flat call and re-evaluate on flop? who suggests pushing for 100bb? am I right? but villain's stack size means you're either folding or playing for stacks.

Do you think you're really ahead >50% of the time here? zero fold equity, so you need to be ahead >50% for pushing OR calling to be +EV. So easy fold. With a read that villain is looser AND more aggro than the average at this limit, maybe it's worth playing. BUT, the limited read is that villain is tight.
That is all. It really isn't even remotely close. Pushing in the situations is the difference between +2BB/100 and +3BB/100.

pgil - aren't you forgetting that you also have good implied odds if opp has a full stack? but you don't have than liberty here

bring on the crucifixion