Why did the colonist fight in the French and Indian War?

As Howard Zinn explains the situation, Indians viewed the French as temporary settlers as opposed to the British, who came to America to claim land from natives. The natives viewed French as less threatening, and the majority fought for France, with the exception of some tribes.
by rading british settelmants. in 1704

A quick tip to help you remember what the French were& did
(Triple "F")
French, Fur, Friends(with Native Americans) and Fishing