Re: First Contact alternate timeline
To be fair the "decades of war" bit can be easily explained as a cold war with the Klingons engaging Earth/Federation forces in minor engagements when expedient. Heck Duras the Lame attacked Archer in Earth's solar system one time. You'd think -that- would have lasting consequences on the attitude towards Klingons. I'd be pissed as hell if Russian forces attacked a US ship in Chesapeake Bay.
"I was never a Star Trek fan." J.J. Abrams