I suspect your inclusion of "right wing" probably derailed your comment - particularly as self-proclaimed "left wing" people can be just as arrogant and out of touch as their "right wing" counterparts.
You don't often hear that from left wing people.
You do hear it a lot from right wing UK politicians.
(Yes, there are similar or mirror caricatures built by right wing people about left wing people. However, even as a right wing person, I might admit that not everyone in the left wing is Pol Pot).
For instance, I consider myself right-wing by local standards, but when looking at how things go in Turkey, if I must choose a party to support, I would pick the one that's a member of Socialist International. Still, I think that does not make right-left split totally silly.