OK let me come at it from a different angle.
I was browsing the twitter feed of a former urban75 poster the other day and saw this quote. It is from The Politics of Everybody by Holly Lewis, I've no idea what the book as a whole is like but this fragment is on target.
Ellen Meiksins Wood makes the same point in her brilliant The Retreat from Class: A New "True" Socialism
It is the interests of the workers that class politics must be built on not their political views (of which voting is generally a pretty poor guide anyway). From the OP the whole tenor of this thread (and plenty of other ones) is that voters are responsible for policies that governments enact (I know that you did not go that far but other posters have).* And that path leads to the opposite direction to class politics, it seeks to create a coalition based not on material interests but on political views - being a Labour voter, being anti-Tory, being on the left. But someone does not leave the working class just because they have voted Tory, employers do not resolve the conflict of their interests with their employees because they vote Labour. For a politics that does not place class struggle at the heart of their politics there is a certain (limited) rational in assigning blame to voters, the conflict is between the left and right, Leave and Remain.
But what advantage is there in blaming voters for those of us that agree with Wood and Lewis? Surely it is better to emphasise the commonality of the material interests of all workers (whichever way they vote, or do not vote)? Is not the fact that majorities of tory voters recognise that nationalisations of key industries would be to their benefit is something that can be built on? The top reason people gave as a reason for voting leave was sovereignty, that they wanted greater control. OK you and I might not agree with all that they mean by sovereignty but surely the the fact that so many people recognised that capital and states are acting against their control of their lives, workplaces, communities was a good thing? My, and I assume your, aim is not to build the power 'the left' or the Labour Party, or even socialists, but the working class,
*Strangely enough this logic only seems to apply to those voters that vote wrong, so voting Leave was supporting Tories and racism, but voting Remain was absolutely not an endorsement of fortress Europe or the attacks on Spain, Italy, Greece. Voting Tory is making a choice in favour of austerity but voting LibDem is not, because that is an anti-Tory vote (regardless of the fact that the 2019 Tory manifesto was economically to the left of the LDs).