So I can understand carrying a rifle to a protest outside a mosque linked to an attack by men with rifles on a gathering you support. That sends a message that anyone thinking they can intimidate the American people into surrendering our basic rights through violence is going to meet some significant resistance.
What I don't understand is carrying a rifle loaded with a 100-round drum magazine to the airport just to make a point. What point? Well, it's not really clear, but he did feel harassed by all the police attention.