To this point, our church has been very reasonable, non-political, and generally supportive of America; displaying the flag, singing "God Bless America", "America the Beautiful", "The Battle Hymn of the Republic", etc. on national holiday weekends, fundraisers for support of military families, etc. This is the first time I've heard a reference like this from one of our priests. And, as I say, he was oblique enough for people not following the Sheehan story to think it makes sense. I'm hoping it's a so-called isolated incident.
Definitely write to him and complain, though. Don't let him get away with it. He may not have realized that you were leaving for the reason you did, so you have to tell him.