Midwesterner,
I am going to try to say this in the nicest way possible. You might want to tone the rhetoric when the basis for your comment is your lack of knowledge of something. In the future you might want to right something like: “what makes you say that, weren’t they separated by hundreds of years?”
The answer to that politely worded question is that I hold of Dr. Lawrence Schiffman’s basic theory of the Dead Sea Scrolls (see one of my earlier posts above). If he is correct that the Dead Sea sect were Tzedukim, then my theory stands to reason because they refer to themselves as “B’nei Tzadok” and they modeled their community around how they perceived Kohanim should act, considered their adherents to be symbolically like Kohanim, viewed themselves as making up for the improper practices of the real Kohanim in Yerushalayim, and viewed themselves as keeping alive the “true” traditions.
If this information is new to you, I would recommend reading Dr. Schiffman’s book “Reclaiming the Dead Sea Scrolls.”