There is a difference between credulous acceptance of authority (bad!) and the kind of trust that any democratic system needs to function (good!). Mistakes happen. It's important that we not take a mistake as evidence of something nefarious without evidence clearly indicating the connection.
Remember: the essence of Trump's political project is to undermine democracy by destroying democratic institutions and to salt the earth so they can't be cultivated after he's gone. That means destroying not only the institutions but the public trust needed for them to function.
Democracies are built on trust. We shouldn't trust Trump. But we also shouldn't adopt his stance that nothing can be trusted.