Why dont historians interpret history the same way?

Because we rarely always  interpret anything the same way; or at least not unless ALL the information is available.

But history involves people and their thoughts and intentions; and this can never really be known (unless we can read minds): historians can't really know what someone's motivations were for sure, specially when that person is not opened about the motivations.

Well the french and indian war took place around 1754-1763 also they were pitted the colonies of british america against those of new france, each side supported by military units from the parent country by american indian it was a seven years war, but it ended with the treaty of paris in main point is that the british wanted to settle in the ohio river valley and to trade with native americans who lived there,so the french built forts to protect their trade with the indians,also in 1754, george washington led an army against the french! can finish it off(hope that (: