The problem with extradition is that in Israel there is no death penalty, and prisoners are a lot less frequently mistreated (relatively speaking.) For instance, EU countries that are against death penalty refuse to extradite their citizens to the US. If the justice systems were similar, then extradition of Israeli offenders to PA could have been possible. But an even more serious complication is that so far Palestinians still have not recognized Israel's right to exist, and they are still in a state of low intensity war against Israel; In fact, it is possible that any future Palestinian state will be dominated by Hamas, which means that any Israeli criminals that Palestinian prisons receive, may end up being kept as prisoners for much longer than anticipated time periods, like Gilad Shalit. Thus let's wait until the future Palestinian country recognizes Israel as an equal country, without the anticipated future Palestinian laws that are already being prepared to make it illegal for any Jew (not Israeli) to be in Palestine.
26-year-old sustains serious injuries in Tel Aviv stabbing (Haaretz)