Why do you think it's so hard for some people to acknowledge the government does not have the welfare of its citizens as the main priority? Background? The era they grew up? A lifetime of mainstream propaganda?
In this case I'm pretty sure they just don't understand the con.
But to answer your question more directly, the ones I've spoken with are just hyperpartisan, dyed in the wool Republicans and the details don't matter.
Their issue, be it gays or abortion or keeping the trannys out of the bathroom, is all they care about and the rest doesn't concern them.
If this seems a bit stupid... Well... We aren't generally talking about the sharpest knives in the drawer.
There are a very few who are highly intelligent and use the talking points as a shield to hide their sleight of hand. They're very polished and know exactly what they're doing. Follow their money trail and you'll see they definitely have something to gain by running the party line.