Since I've been accused of being hateful for pointing out bible verses being used in hateful ways, I have a suggestion for a prayer sign.
I know that the bible is full of brutality and hate, yet there are some very good verses in there. You just have to search through all the smelly oysters before you find the pearl. If Christians want to use the bible in a "Christ-like manner", I suggest searching out the enlightened verses instead of using poems written by evil tyrants. There's an entire industry of publishers that will do that job for you. You just have to read the study guides and use the nice verses.
My suggestion is one of my favorite verses in the entire bible. I had to search for it again because I forgot the reference. Christians, enjoy. This one is for you, because this is what our country really needs.
Let us therefore follow after the things which make for peace, and things wherewith one may edify another. Romans 14:19