Calling someone a natzi isn't racist, considering it's a political party, not a race.
He was being a bigot, though, and teamspeak insults do not matter in case of crpg. Also, you guys only threw 1, maybe 3, ladders up after catapult was up. After that, we threw most of them specifically to disrupt the catapult.
You say all this like he was griefing the whole match, but from the opposite side, you guys didn't throw a single ladder at the breach after the about a minute of the catapult being up.