I'll grant you that the Professor didn't set the greatest example after the war started. He lost some hope, after constantly seeing so much war and pain constantly at the forefront. It's understandable.
But following a different path is NOT sitting idly by and doing nothing, and you insult everything he's done by suggesting that. If that were the case, you'd still be sitting in the Pentagon, enjoying liquid lunches through a plastic straw. It's about considering the challenges, weighing the consequences, and finding the best solution available. It may not be the most efficient solution, but if it keeps from killing people you love, it's worth it.