Why did the crusaders begin fighting other christians during the fourth crusade?

I was intended to reconquer Muslim-controlled Jerusalem by means of an invasion through Egypt.

Explanation:

the answer is d. party organizers, volunteers, voters and elected officials.

- "bill clinton ( the 42nd u.s. president, served in office from by low unemployment, declining crime rates and a budget surplus. during clinton's second term, the u.s. economy was healthy, unemployment was low and the nation experienced a major technology boom and the rise of the internet."