I think your critique is a critique of pomposity in general. There are pompous people everywhere, on the right and the left, I doubt Aberdeen Uni Socialists are immune from it . I'd suggest 'the left' are doing better now than at any time in my memory, and UKIP and Farage are electorally speaking an irrelevance, which doesn't really support your argument. Personally, as long as someone is genuinely willing to roll up their sleeves and do something to contribute to society, whether they call themselves left or right, or whatever, they share the same values as me. A lot of these traditional binary labels don't serve any purpose anymore.
On the other hand, there are some areas where politically, I wouldn't compromise, like free health care for everyone. I'm not willing to spend my time being polite and trying to 'understand' and 'listen to another point of view' to people who want to sell off the NHS to US hedge funds, like, let's see, most of the Tory cabinet, who are doing so for their own financial interests. I will argue against these people and I won't shy away from telling them they're morally wrong, whether they like it or not, regardless of education, social class or whatever.