Explain to me how this fish thinks

[fyodor]

5/10 6 handed

His precise numbers are unimportant and I am too lazy to look them up. He was a bad loose fish.

I open raise J[img]/images/graemlins/club.gif[/img] T[img]/images/graemlins/diamond.gif[/img] on the button.
Fish in BB calls with A[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/diamond.gif[/img]

T[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/diamond.gif[/img] 4[img]/images/graemlins/club.gif[/img]
bet call

5[img]/images/graemlins/heart.gif[/img]
bet raise call

K[img]/images/graemlins/club.gif[/img]
donk bet

wtf does he think I am going to fold here that I just raised the turn with?