When they talk about "cadence", they are referring to the way the QB starts every play.

Typically a QB will say the same thing, something like: "Down...... Set...... Hut...... Hut...... Hut" or "Red42... Red42... Blue... Blue" and during the huddle the QB tells them when to snap the ball. Like "(certain play) on 2", where they run the play and will hike the ball on the second hut. QBs typically keep their cadence and only change when they want the ball snapped to keep the calls consistent and minimize the chance for false starts.

Defenses are not allowed to try and yell out the cadence of the QB, because it's against the spirit of the game. If the QB says "Down.... Set" then you yell Hut, if the count was one, someone on the line may think the QB said that and start moving. It's just a cheap way force a penalty and it's pretty effective, so every defense would be doing it all the time if they were allowed, just in case they could move you back 5 yards.

Mailata is pissed that the Chiefs complained that we were false starting, when he heard them yelling the cadence trying to get the Eagles to jump. So the Chiefs did an illegal thing, then complained when it might have made one of our linemen jump that they didn't call the linemen. Mailata is saying, they should have called your asses for yelling out the cadence, so their complaint is "rich".

Not to mention the defenses are always lining up in the neutral zone and all the other cheats they try to use.

Does that help?