One way of looking at it
Slow down. Take a step back.
The National Prayer Breakfast was founded in 1953, when President Dwight Eisenhower accepted an invitation to join members of Congress to break bread together. Every president since has participated, regardless of party or religious persuasion. It offers an opportunity, according to its organizers, for political leaders to gather and pray collectively for our nation “in the spirit of love and reconciliation as Jesus of Nazareth taught 2,000 years ago.”
And that’s a bad thing, because it’s a gross violation of religious freedom, aka the separation of church and state. It’s not really an “opportunity” for “political leaders” aka the government to gather and pray collectively, is it, it’s a conspicuous push to do so. Government needs to be secular. The “National Prayer Breakfast” is wildly anti-secular, aka theocratic. Theocracy=there’s no way to vote the god in question out.
It is testimony to the marketing genius of Donald Trump that he never sold himself to Christians as one of them—pious, devoted, merciful, forgiving, irenic, biblically literate, a faithful husband and father, a man of high moral standards.
Is that marketing genius? Or is it just the familiar fact that Trump is a foul human being who loves to shove his foulness in our faces all day every day?

The National Prayer Breakfast is a Cold War leftover anyway.