Guy is 88/6... Even for 30 hands of a sample size is more than enough to say that this guy is loose passive and post-flop AF is more of a proof for this. Doesn't it look even a little suspicious for this guy to raise our pot sized bet?

Yes his range includes some worse Ks, Kxdd, flush and straight draws but it also includes better Ks, 2prs and sets... When a passive opponent decides to raise my psb on the flop I usually wouldn't be willing to stack of with top pair middle kicker.

I would call and re-evaluate the turn.