Player Throws His Opponent To The Floor ...

[BillyMac]

4.19.3 SITUATION E: A1 is dribbling in the frontcourt. A3 and B4 are in the lane. (a) A3 throws B4 to the floor; (b) B4 throws A3 to the floor. RULING: In (a), illegal and in (b), intentional foul due to excessive contact while the ball is live. (4-19-3d)

I see only one difference between these two fouls. One, by A3, is a team control foul, and the other, by B3, isn't a team control foul.

Since both are described in the same exact manner, player throws his opponent to the floor, why is only one deemed intentional?

While a team is in control, can player on that team can be charged with an intentional foul followed by two free throws and ball as the consequence?

Or, does one never shoot free throws for a foul against player who's team is in control, even if the foul is deemed to be intentional, or flagrant?

Why am I confused by such a seemingly simple casebook play?

And where are my reading glasses?