Oliver Cromwell, like the vast majority of Civil War participants on the Parliamentary side, had no intention of overthrowing the existing social hierarchy. What set him apart from the rest of the Parliamentary leaders was his refusal to look more than one move further on the board. If he saw a problem, he would choose the best and most obvious way to solve it, regardless of the consequences down the road; he would deal with them if and when they came up. In other words, he was a totally linear thinker.
In most ways, Cromwell and Trump could not be more different, but in this way, they are similar. Trump blows things up to solve an immediate problem and worries about the consequences later. We are feeling that today in connection with the war.