The Labour Party was already having enough difficulty keeping itself together without a referendum on Britain’s membership of the European Union coming along. The party was reeling from the election of a leader who was not only well to the left of most of his parliamentary colleagues but also did not obviously have the personal skills needed to do the job. However, the referendum on the EU compounded the party’s difficulties by exposing another fissure - between its traditional white working class supporters and its public sector socially liberal middle class ones (including the vast bulk of its parliamentary party). In combination the two divisions threaten to tear the party {a}part.

Elections in the UK are usually about the left and right of politics, whether the government should do a little more or a little less. On this Labour’s working and middle class supporters tend to be at one with each other. They all, albeit to varying degrees, want the state to do more, to curb the excesses of the capitalist market and produce more equitable outcomes. So long as political conflict focuses on this issue they are a viable electoral coalition.

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Corbyn not to blame

Against this backdrop it was hardly surprising that across Britain as a whole only around two-thirds (63 per cent according to Lord Ashcroft, 65 per cent as estimated by YouGov) of those who voted Labour in 2015 voted to remain in the EU. The party was never likely to achieve much more than this. And at least the party’s coalition did not fracture as badly as the one that backed David Cameron a year ago; well under half (42 per cent according to Lord Ashcroft, 39 per cent, YouGov) of those who voted Conservative in 2015 voted to remain. The real source of the Remain side’s difficulties was the failure of David Cameron to bring his own voters on board.

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Yet it is Jeremy Corbyn who is taking the blame ... inside much of the Labour party for the Remain side’s failure, as the party’s pre-existing division about his leadership interacts with the division made manifest by the referendum. Of course, MPs are entitled to make their own judgement about Mr Corbyn’s capabilities for the job, a judgement that his performance in the referendum appears to have reinforced and which they may feel has become more pressing given that the outcome of the referendum makes an early general election more likely. But in truth there is little in the pattern of the results of the referendum to suggest that Mr Corbyn was personally responsible for Remain’s defeat. The referendum outcome looks more like a pretext for an attempt to secure Mr Corbyn’s removal than a reason.

http://www.newstatesman.com/politics/staggers/2016/06/dont-blame-jeremy-corbyn-polls-show-only-tory-voters-could-have-kept-us-eu