You probably thought the UK miners' strike was their fault, too, huh? https://en.wikipedia.org/wiki/UK_miners%27_strike_(1984%E2%8...
But he did not do that. He betrayed the Workers for his own political delusions. He just wanted to be the one who brought down a government, he didn’t give a stuff about the People. Why do you think the DUM split off from the NUM? That’s why he can never be forgiven.
By the way the previous government to Thatcher had closed twice as many mines as she did, and not a squeak from Scargill. Doesn’t that strike you as a bit odd?