This kind of operation is absolutely critical to the viability of a Palestinian State.
Here's a case of Israeli-backed Palestinian military forces targeting extremists in their own territory. The question is, how can the PA independently carry out such operations and use counter-insurgency techniques to better its intelligence on insurgent activity? Israel can't support these operations forever, and unless the Palestinian people support them, there's little hope for the sustainability of a Palestinian army. For more, see my yet to be researched or written doctoral dissertation, scheduled for release around 2016 if all goes well. Keep your fingers crossed.