Buddy calls with rules question

[Mark Padgett]

A buddy called me this morning about a call he had in a kids game last night. NF rules. After a violation by team B, A1 to inbound on the side. While the inbound pass is in the air, A2 and B2 foul each other for a double foul. The AP arrow is with team B. Should they give the ball to team B for an AP throw-in or use POI and give it back to team A even though there is no team control during a throw-in?

His point was that if they used the AP arrow, it seemed like they were penalizing team A for a foul that was equally caused by both teams.

What would you have told him?