Thomas Jefferson who worked very hard to get the idea of seperation of church and state in the government had some very good thoughts.
"It does me no injury for my neighbor to say there are twenty gods or no God. It neither picks my pocket nor breaks my leg."
-Thomas Jefferson, Notes on Virginia, 1782
which sort of applies, people can say what they want, but stealing the sign is wrong.
Where the preamble declares, that coercion is a departure from the plan of the holy author of our religion, an amendment was proposed by inserting "Jesus Christ," so that it would read "A departure from the plan of Jesus Christ, the holy author of our religion;" the insertion was rejected by the great majority, in proof that they meant to comprehend, within the mantle of its protection, the Jew and the Gentile, the Christian and Mohammedan, the Hindoo and Infidel of every denomination.
-Thomas Jefferson, Autobiography, in reference to the Virginia Act for Religious Freedom
I am not saying that any one or other or none or many is right, just that we can all disagree without harming each other, and I think Thomas Jefferson was a lot smarter than I am, which is why I frequently fall back on his quotes.
if you google "Jefferson + Religion" there is much on the topic.
"Because religious belief, or non-belief, is such an important part of every person's life, freedom of religion affects every individual. Religious institutions that use government power in support of themselves and force their views on persons of other faiths, or of no faith, undermine all our civil rights. Moreover, state support of an established religion tends to make the clergy unresponsive to their own people, and leads to corruption within religion itself. Erecting the "wall of separation between church and state," therefore, is absolutely essential in a free society."