To reiterate an earlier comment — You will most likely find that there is a correlation between evangelical Christianity and support for Trump..
Certain evangelical groups have equated Trump being elected with the second coming of Christ (seriously) and thus it’s become like all other evangelical infused issues – admitting to being wrong about Trump would be equal to rejecting their own religion, hence they double down on ‘believing’ in Trump. It’s just like the same idiot creationists, for example.
There’s a nearly 100% correlation between religiosity and Trump evangelism.
This billboard is just a demonstration of that point.