What if they have launch on warning? Or if they don't, do you want them to?
Should we hit them now? Yes, maybe. Perhaps after a we do a little more work on orbiting lasers, etc., identify where their forces are, their ships are, their missiles are, and hit them first, hard. With nukes? Yes. Now's our chance.
I'm not bloodthirsty, by any means. This is the last thing in the world I wanted. But I do want a future for us and it's beginning to look pretty bleak with the whole world aligning against us.