I'll give you what you want

[KCRef]

At a men's rec league last night we had a 3/4 court pass by A1 to A2 who caught the ball just inbounds near the sideline. B2 makes a little contact with A2, but enough to push him out (while A2 is holding the ball). My partner blows his whistle and says, "We're staying here, A's ball." The B team of course questions the call because A2 went out with the ball, but the ref is saying out on B2, who never touched the ball. My partner didn't like the complaining, so he baits them by saying, "What call do you want?" To which the B team replies, "B2 never even touched the ball, how could it be out on him?", which everyone in the gym knew to be true. With this comment, my partner yelled to the table, "OK, I've got a foul on B2," and then he administered the throw-in. This happened twice in this game against the same team.

Now, I know this is not right, not even in a men's rec league, but my question is, what do I say to B3 when he comes up to me and says, "That is not right. He can't do that," without hanging your partner out to dry?

After the game my partner did mention it to me and explained why he tried not to call the foul, and I told him that I personally would have called the push, to which he repeated how he didn't want to call a ticky-tac foul. I said OK.