Magnetic Pole Shift vs. Police Backup

Apologies if this has been asked before.

Magnetic Pole Shift says:

"At the start of the villain turn, discard the top H minus 2 cards..."

Does this remove the Police Backup?

"Whenever a villain card would have a player discard a card..."

1) Is discarding from the top of the one's deck "discarding"? MPS uses the "discard" terminology, but we always thought discarding applied only to cards from your hand.

2) Is the player the one doing the discarding due to MPS? It doesn't say who or what discards the top H minus 2 card. Is it the MPS doing the discarding, or the decks' owners?

1.  Yes, a discard is being forced by a villain card

2.  The villain card is causing the discard.  Even things like "Consider the Price of Victory" doesn't specify who is causing the discard.  Police Backup only cares that a villain card caused a discard.  

Thanks!

So the “player” part of Police Backup’s text is irrelevant? What if a villain discarded cards from his own deck? Would that still destroy Police Backup?

Edit: Whoops, hadn’t read that all the way through. I thought MPS discarded from the environment deck.

I need to play Deadline more…

If I have to clarify further then a villain card caused a player to discard a card.   The villain discarding cards from just the villain deck would do nothing.  

No, you were totally right. I just did that thing where my brain fills in stuff I didn’t actually read.

I do that all the time.  For someone who reads as much as I do, I'm astonishingly bad at it.

I know what you mean. Me, too!

That's impressive Arcanist Lupis but why only gourmet cookbooks?