NFHS Question
 

Team A passing. Team B commits DPI. Team B intercepts the pass.Durning the return Team A has PF facemask. Should the fouls offset and replay the down.

Yes.

Had Team A committed OPI and Team B committed the FM after the INT, Team B could decline the OPI in keep the ball.

But in your play, the team with possession at the end of the play did not get the ball with clean hands. Replay the down.