This is a recent article in the far leftwing Guardian discussing some apparently incompatible goals of leftist ideology.
And therein lies one of the central dilemmas of political life in developed societies: sharing and solidarity can conflict with diversity. This is an especially acute dilemma for progressives who want plenty of both solidarity (high social cohesion and generous welfare paid out of a progressive tax system) and diversity (equal respect for a wide range of peoples, values and ways of life). The tension between the two values is a reminder that serious politics is about trade-offs. It also suggests that the left’s recent love affair with diversity may come at the expense of the values and even the people that it once championed.