Please correct my thinking patterns if they're incorrect. I think that's the most valuable rather than just telling me I'm a noob for making a mistake.

This hand was played at 10NL Zoom. We have 0 hands on CO. I have no idea if he is a fish or reg, but at least he had over 100bb and he open raises a normal size, which makes me lean ever so slightly towards reg / tag.

Preflop
Standard 3bet for value facing an open from the cut off. I always 3x the open in position when 3betting.

We have the options of 5betting all in or flat calling the 4bet. I decided to flat call since I've seen some steal / re-steal dynamics in the field with weak hands. We want him to continue bluffing with those weak hands. Also this sizing looks A LOT like AA & KK or an airball. I would often expect a slightly larger size with JJ-QQ & AK given that those hands are more difficult to play post flop.

If we 5bet, we're getting it vs a narrow range, which we could also stack most of the time on some runouts given stack to pot ratio and being in position.

Flop
The dreaded A. We really have to call. I don't see any point in raising or folding. We would put him off bluffs by raising and only get it in vs Ax (and some rare draws).

Turn
We get some more equity with a backdoor flush draw. This card also gives villain some opportunity to be bluffing with a single diamond, although we are beat by Ad, we block Kd, and Td is on the board. We also block a lot of his AK valuehands with two kings. I don't see him showing up with many AQo here. I'm also aware of the fact that we've under-repped our hand preflop. We look a lot like 88-QQ & AK sometimes. 88-KKs are normally folds facing two bets on A high boards.

Villain decides to bet 7$ into 9$. In 10NL. Given the stack to pot ratio, I would expect villain to check to me to give me an opportunity to bluff a lot of the time (70%+). The diamond turn card certainly is the perfect opportunity for that. He can still bet the river if I check back.

Some nutty hands would also bet small on the turn to jam the river, pricing me in with draws or getting me to call with weak hands.

Given everything, I decided to call the turn all in. Right now I'm leaning towards a call, but I'm really unsure. What are your thoughts on this hand?