Justification lies not in history... so long as people defend this practice they can't also eat the cake and claim to support democracy... and what is the rule of law? Lack of civil war? May also wants to destroy human rights, which Assad actually put into physical practice... as such, if the unelected cabinet decides to set up, hypothetically, the Final Solution ('Go Home' vans could easily transform into eradication of 'swarms', which I'm sure was how Hitler viewed the Jews), will people still claim it's rule of law and that they're justified to be there just because some previous government's manifesto was voted in but a year later clearly moved the goalposts?
There was a coup in Turkey and even that government had more votes than the UK's could ever dream of... so, I assume, if people are oppressed it is useless to think that 199 voting for a PM is democracy, because they could revolt, especially when divided, like Turkish people are (and after Brexit everyone knows how divided the country ended up being, with hate crime increasing).