"He didn't accept your particular world view and therefore, what?"
Then we polemicise, and put our case, surely?
"Benn touched the thinking of millions which is more than you ... will ever manage to achieve."
Well, let's hope not. But the measure of who (from a socialist standpoint) is right and wrong is not "touching the thinking of millions." Lots of people with very diverse views "touch the thinking of millions".
If there is any point to this posting you need to say what Benn was right about, and attempt to justify it.