Sadly varian there are those who actively support the rhetoric and the direction of travel. We're in the midst of a cultural war. Hence the attacks on the "experts" and rational arguments, etc.
Johnson's persona and Cummings' appearance are quite deliberately manufactured. For example, Cummings' strange chanting of some character from a children's cartoon when asked serious questions. The bizarre bouncing buses and 50,000 nurses routine was part of that.
There's a culture of fear in the civil service and amongst SPADs and this is all part of that. Any parent knows that it's impossible to get any sense from most toddlers, so if Johnson behaves like a toddler nobody can expect any sense from him. Nevertheless, he will just do as he and his guru want. The man is ruthless - make no mistake about that - and there are those, who have felt left behind in a mature world, who support him.