The boost phase is the best time to take out missiles because they are moving the slowest and at their most vulnerable phase. Additionally, missiles with multiple warheads need to be taken out as close to the launch pad as possible.
Well, I agree with you here, I think it is a bad move to cut the boost phase programs. That said, I could have potentially dealt with it if they had increased the MKV program, but that is being killed as well. I would argue more for boost phase defense based on redundancy, more so than anything else.
We need more missiles as part of the GMD and Aegis programs if that is what we are going to rely on simply because once a nation like North Korea can get a workable missile that can reach the United States, they will be able to duplicate it, and then overwhelm the small amount of defense we have against this threat.
People didn't think the advent of the Airplane would make transatlantic dirigible and ship travel obsolete. It will take less time to develop defenses that make nuclear missiles obsolete than waiting for the UN to do something about limiting and reducing nuclear stockpiles of member nations.
Well if you want to claim it can make the nuclear missile obsolete perhaps I can buy into that in a limited fashion, but it will never make nuclear weapons obsolete. I should have read your previous comment more carefully, since that was specifically what you were referring to.
That said, the UN is never going to get to the goal of zero, and no one in the US really wants a goal of zero, except for maybe a few fringe types.
I think this goes back to my post on the role of nuclear weapons. If you agree with option 2 (as I do, and it would seem you do as well) then defenses are vital because there is no certainty that deterrence is a viable option. It seems however that the current administration has bought into the logic that everyone is able to be deterred and defenses are of little use. I think this is a dangerous road to go down.