Gaza: internal fight or foreign interference?

The internal fight among Palestinians in the Gaza strip has been in the news for several days now. But nothing is said about the situation in which this fight takes place nor concerning the Palestinians working with the US to undermine the new unity government. An important player is Mohammed Dahlan.
Take half an hour and read some more on this issue in the following articles:
Palestinian Pinochet Making His Move?, about the role of Dahlan and
How the Saudis stole a march on the U.S., concerning the Mekka-agreements and the role of the US in undermining the Palestinian unity government.