I don't like dealers talking like this, but you probably should not speak up about it since the truth of the matter is that what is being said isn't that bad, your playing low limit, its after the hand is over and in all likely you your saying something is going to make you look like a nit to the other players (And of course if you say something rudely like "Hey Dealer STFU" your not helping the situation at all). If it really bothers you wait for the end of the down and mention that it bothers you politely to the dealer away from the table.