The problem with politics is the human ego. Each and every attempt at establishing a movement for change has foundered on the rock of aggressive assertions of individuality (often by the wealthy), such that A can't stand B, who refuses to work with C because of what D said to A five years ago, which was slanderous and resulted in B telling E, F and G never to work with D again because they simply can't be trusted. So, even though A-G all agree on the super-objective, they splinter into their own little cults to establish a coterie of like-minded disciples who will be faithful to their particular fragment of 'ever farther dis-union'. As a result, H, I and J just give up, even though their contributions and gifts would have been invaluable.
There, I fear, you have put your finger on it ... there are many, for instance, that will not touch "referism" because it comes from here. I think the reality of power might change things though ... the Conservative Party is an alliance of individuals, many of whom loathe each other, but will unite in the common cause of gaining power. It is only the little grouescules that dissolve in a welter of recriminations ... typical small-party politics ... because they do not have the prospect of power to unite them.
Thus, the key issue here is one with which you will be familiar ... faith. People must have faith in their own power and their ability to change things. With that, anything is possible.