Quote Originally Posted by fj1200 View Post

But those are words on a universal symbol. Not the same as post-applied stickers on the PEOPLE'S Bumper.

Quote Originally Posted by Arrow v. United States
"...It is quite obvious that the national motto...'In God We Trust' has nothing whatsoever to do with the establishment of religion. Its use is of patriotic or ceremonial character and bears no true resemblance to a governmental sponsorship of a religious exercise. "
(shrug)

It seems that most other posters here are on the side of the sticker because it promotes religious exercise.
And some people are on the side of Cops because Cops have wicked-cool cars and lights and shit. WHY folks support a phrase doesn't change the legal read on its use.