Farage is not similar to Powell.
Farage left school at 16 and seems from his public announcements to have a permanent chip on his shoulder about people with further education (his address to the EP in which he said none of them had ever had proper jobs was a case in point.) Powell was an academic who thought that his education and military experience made him superior to other people, especially hoi polloi. Powell was probably repressed gay and showed several symptoms of having OCD, such as a refusal to shake hands with people and an attitude to scholarship which was described by one of his pupils as “textual mania”.
They are only similar in that they seem to enjoy/have enjoyed sociopathic wrecking. Let’s get Godwin over and say that if Farage were to be described as mini-Hitler, Powell on the same scale would have been mini-Rosenberg.