The thing that makes me still want to push is the fact that people do not like to blocker-bet/fold, and often level themselves into calling with worse. He should not be betting so small with a flush as it is obvious I have sdv, and river is a scare card. He should be v/betting as much as he thinks I will call with flushes, so this 1/3 pot bet doesnt make sense. He could be inducing but it doesnt look like a good spot, esp when we have no history.
One thing I would say is, in general....blocker-bet/folding is not a good idea, as people play pretty badly against them.