You have quite the high opinion of yourself, I'm not saying that is a bad thing but you tend to think your views are the only correct one. You said that no one has convinced you otherwise? Duh, you think you're the definitive word. It is impossible to convince you otherwise. I sent emails to 6 people I went to college with and included what was on the sign. Four were Christian, one agnostic and one Athiest. Not a single person took that as the Goverment telling anyone what to do. We had debate as to whether is was legal, but no one took it as Goverment pushing anything. You have yet to support your initial claim. To say that sign is telling anyone anything is just plain false. You need to read up on the definition of being told what to do. BTW, the Athiest and Agnostic were on the side of the sign was legal. You have a very narrow view of rights. In fact you are the only truly close minded person on this thread.
No, I am open to the idea that I maybe wrong on certain issues. That was actually one of the reasons for me starting this thread, to see if anyone could provide a convincing counter argument. However, all I have receive so far is mostly angry yelling, assumptions, accusations, and insults. The only one that seems to have provided a somewhat civil argument has been you. However, your argument has pretty much amounted to,'Christianity is the largest so they deserve more rights.'
Also, concerning your emails to your friends, the problem is that the sign is an uneven, unjust endorsement. It isn't telling people to go to church (that would imply some sort of enforcement or directness/persistence), they are suggesting. If the sign was owned by and paid for by an individual, or group of individuals, and placed on their property (or property of someone giving consent of the sign placement), then it would be different. That is their right. However, the US, state, and local government has no place in religious affairs. Also, your friends, since they are friends, are more likely to share you views, therefore they are not very useful in a debate.
Finally, I encourage you to look through this thread and the thread "No Atheist Allowed" (since this issue is mentioned in it as well). There have been a few individuals that have agreed or see my point but don't personally care about the sign. Also, belonging to the majority or minority does not imply that a individual is correct or incorrect respectively.