Every fanaticism is dangerous, even for people who know them to be fanatical and who reject them.
Our President lacks humility altogether. He recognizes the power of nothing and no one outside or above himself. He is an arrogant and small-minded person.
“There is no respect for others without humility in one’s self.” Henri Frederic Amiel
These people are very dangerous ‘leaders’, if they can be said to ‘lead’ at all.
I've heard it said the other way around: that only people who do not respect themselves, disrespect and abuse other people.