I dont C-game that often, but sometimes I give it a go..
I like betting small sometimes to block calls or get value from worse hands or even semi - / bluffs as in this particular case.
Would like to hear your thoughts about this hand/hand range he could have played.
I am thinking like A5 Diamonds, which could PF open and call my 3bet.
Flop call with a pair of 5 and turn Raise defend his flush draw and fold on river shove.
But I am not as genius as people here on this site, I play poker for a long time but I feel like a newcomer here :D