How to unite and conquer
It is not dissimilar to the Trump period in the US. Fortunately seems to be over for the time being. If you look at Trumps personality you can see how damaged it is.
If you look at the history of Hitler he was a broken man perhaps who not only did not realise he was broken but it became a strength in an unusual way because of the history of the time. Looking back I think most people probably thought why did I follow such a person but the times themselves gave them reason.