Well, your claim was that we had no defense. You were simply wrong. And then I observed that you were pettifogging over how good it was, which is substantially a subjective view. I said quite plainly that it was paltry, so we could have parted in agreement. But if it could have intercepted a warhead targeting your city, would you be the first to curse its existence?

Your mission requirement ("if our enemies wanted to annihilate us") is total fantasy. The critics of ANY strategic defense usually come up with a threat that nothing could defeat, so you are simply carping because your ignorance was exposed. First, there is no way that total annihilation is possible even with the existing inventories. I've read the analysis by the experts. Secondly, those with the largest and most capable inventories are not interested in our annihilation. They are substantially deterred by our counterstrike capability. I don't personally think that is good enough, but what you want is a magic defense that doesn't cost any time or money to develop or implement, and which ensures we don't even get bruised. I worked on a system concept under SDI that had a good prospect of negating 90% of a full-scale attack for a price tag that would seem cheap by today's budgets. We even developed and static tested a prototype interceptor. No takers. (We didn't then have the cheap transport to orbit that we have now, and now we have demonstrated operation and control of much larger constellations.)