The following is based on an idea I read somewhere on a right-wing website that even I hesitate to link to:

In 1971, John Kerry was anti-war and claimed that young men were being killed for no reason and committing war atrocities directed by those up and down the chain of command. So if George W. Bush came to him as a young man in 1972 and asked whether he should go to the war, serve in the National Guard or go to Canada, what would Kerry have said?

And by the way, what exactly was he saying at the time to other young men with that option?

Didn't Bush do exactly what a supposedly patriotic, yet anti-war Kerry would have wanted other young men to do? Bush had a much different war to opt into or out of 3-4 years after Kerry's Vietnam.