Yea that's a big theory. There are many tribes of Pashtuns. There are many tribes of Israel. It's likely these two are connected. But we have more than one origin.
I thought Paharis were related to Pothwari. Anyways, it's good to see ethnicities having more and more similarities.
Like for example, a lot of Sindhis descended from Balochis. A lot of Niazi descended from both Punjabi/Pakhtun people. Many Punjabis with Pakhtun ancestry. Chitralis mixed with Balti. The list goes on. We are more similar than we think. Pakistan is a pseudo-homogenous country.
Not more conservative than Pakhtuns.