The problem with living your life according to bumper stickers is they may sound clever but are often based upon a faulty premise, as is the one you mention. Jesus and God are identical in what they say and do and are, thus cannot be divided as if they were. They don't tell us to be the best we can be, they tell us to live according to God's word. Pence's view is none of the things you ascribe to him. And neither God nor our Constitution say Christians should not be represented and active in our government, though I am sure you would prefer it. Never going to happen.