In my opinion, "God's Official Party" is not Repulican, Democrat, Libertarian, etc. It is a group of God fearing humans who put God first, above any party affiliation. I might not have been offended if I saw a bumper sticker like that (since I happen to be a Republican voter, most of the time), but I can see how other's would be. There are plenty of Believers who don't necessarily adhere to the Republican party's beliefs.