Given that the "Santa" image is undoubtedly derivative of the "little red man" (an alkaloid found in amanita muscaria) who mediated the spiritual experience of the Saami shaman, it would be difficult to figure out which side the ACLU was favoring here.
I've always suspected they were a bunch of dopers, but now they seem to have stepped off the planet completely.
Hide your stash! It's Xmas and they're loose!
I wonder if the ACLU would have been as upset if a guy in a Santa suit showed up to show school kids how to put condoms on a banana or to pontificate on the 'virtues' of abortion.