Some Democrats complained about the rampant anti-Constitutionality of warrantless wiretaps and indefinite detention during the Bush administration, and the Republicans called them anti-American. Some Republicans are complaining about the anti-Constitutionality of bombing a foreign country with no Congressional authorization (while ignoring the anti-Constitutionality of continued indefinite detention etc.), but nobody is calling them anti-American. Amazing that both parties only recognize we have a Constitution when it says stuff they agree with.
To be fair, although nobody seems to be calling Republicans anti-American (I’m pretty sure only the GOP can use that term, something about trademark infringement), there are plenty of other insults being lobbed about. Obviously, anyone who refers to the Constitution is a fringe nutjob in today’s political climate.