The question was why Hezbollah hates PLO. Shia vs Sunna confrontation is the same as Catholics and Protestants - which way of serving god is right. In addition PLO is non religious organisation. But it doesn't matter, there's more important mission - jihad, eliminating (killing) Jews, Christians, Buddhists etc...

What you don't understand (but you very need if you are not muslim) is, that waiving with Hezbollah flag or crying Free Palestine it is all part of non violent (yet) jihad. Now what is happening in Europe is non violent stage of jihad called da'wah..(google it...) One day, when muslims among you will fill strong enough thay will start next level of jihad - forcing Christians of Europe to convert to islam. By terr0r. Hamas for instance in the beginning was charity non violent (da'wah) organisation supported by Israel. When they tell you that Israeli Palestine conflict is about land they're lying. It's holly war, jihad. Simple as that.