I don't understand, are they Islamic billboards that mention Jesus? It certainly doesn't offend me, but can I ask why the billboards would mention Jesus and not Muhammed?

In answer to the broader question, there are a lot of religious billboards around here, I don't find any of them offensive. Thinking of it though, they're all Christian, the only one I can think of that isn't is Bah'ai. The idea that Christian billboards are more acceptable than Islamic billboards is offensive though.