A far better approach is to undermine the current political control of China. I would welcome China as a friendly democracy, and that's far more realistic than a pre-emptive strike against them.
Well the Chicoms have expressed their willingness to lose their economy several over the past two years. If they are as extreme as they say, then we have no choice. Too many times have the red Chinese have been appeased. We need to draw a line and if we lose LA, thats a price worth paying to stop them.