pretty obvious

Fla. man says Home Depot fired him over God button

WEST PALM BEACH, Fla. – A former cashier for The Home Depot who has been wearing a "One nation under God" button on his work apron for more than a year has been fired, he says because of the religious reference. The company claims that expressing such personal beliefs is simply not allowed.

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C'mon - he was trying to get fired if he broke their rules this flagrantly. Of course you can't have religious displays at work.