Why does Iran support the Palestinians?

Re: Why does Iran support the Palestinians?

I was having a discussion with one of my Shia friend's parents tonight on this topic. They are Pakistani. They said that because of the hateful nature of the Sunnis in Pakistan, the Sunnis would start killing Shias on a much larger scale than it already is, if Iran allied itself with Israel and America. I said that doesn't make sense, Pakistani Shias have nothing to do with Iran. They said ,to the ignorant Sunnis, that doesn't matter. When it comes to mob rule in Pakistan, logic and sense do not matter. Then I asked about Egypt and Jordan, secular Sunni nations with ties to Israel and America. They went back to the insistence that the Sunnis will start killing Shias for whatever reason that they can find.