Granted. However, to do so at this point would be a very, very weak argument constitutionally. Not only would you be treading on the first amendment, it could also be very, very easily argued as a violation of the constitution's bar against ex post facto laws. (granted, that's a ban on criminal law, but given the creep seen with the interstate trade clause, I don't think it's a stretch)
To even have a snowball's chance in hades of standing up, the ordinance would have to be worded to eliminate the possibility of ANY religious structure within X radius, and then the howling would really begin.
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