Like most things, it's more complicated than you would like to make it out. I don't agree with the PA's stance on paying "terrorists". I personally don't think we should be giving money to Israel OR Palestine, but that's another complicated issue, so I assume you're not interested in that. Outside of your standard simplified rhetoric, it's difficult for a compassionate human being to not empathize somewhat with the plight of the Palestinian people. In my opinion, the Palestinian people have been systematically oppressed and beaten-down for years. Of course in 3rdnlng world, they are simply brown-skinned heathen Muslim terrorists who deserve whatever the get.
So the short answer to your question is that I don't support paying PA terrorists who commit crimes in Israel. I also don't support paying for Israeli weapons that are used against the Palestinian people.