Well you are right that both sides shouldnt trust foreign powers. But March 14 is forced into requiring outside help because of hezbollah and the rest of the pro-syrians. They are getting help from outside forces and if march 14 doesnt do the same the pro-syrians will become more powerful/influential and they will win.
To be honest if i had a choice between having american influence in my country or iranian/syrian influence i would choose american in a heartbeat, isnt much of a decision to make really.
We, maronites, should thank the US administration for their valuable advice to leave Lebanon in 1976 during the memorable meeting at Kaslik, and make space for the palestinians. But we refused it then. We have been under that same pressure for 30 years. It took different forms but stayed constant. The only people who understood fully that fact were the members of the "Lebanese Front", Camille Chamoun, Pierre Gemayel...We do remember the saying reported from Rafic Hariri beginning the 1990's: if you cannot islamize the people, then islamize the land. That is what we have been observing since 1992, the Hariri clan has been forcing the country under heavy debt since then until the creditors begin asking for their money, and you might guess who are the creditors. What would be the price of writing off this debt?