Re: You've already had a second vote
So, when you vote for a party you fully support their entire manifesto without question?
I may not support the entire manifesto of the party that I vote for but if there is a manifesto pledge on a policy which I have very strong disagreement with then I do not vote for that party. I try and find another party which does agree with my views on that policy and vote for them.
If remaining in the EU was really that important for so many people then I would have expected the Lib Dems, Greens, SNP and PC to have done much better in 2017 election as ISTR they were all quite vocal in their pro-Remain stance. As it happens they all saw a very small fall in their vote share at the national level from the 2015 election (even if some of them picked up a few additional seats).
If a candidate stands for election on a manifesto with their fingers figuratively crossed behind their back then they probably should consider whether they are in the right party.
And BTW, in the 2016 referendum I voted to stay in the EU. By the time of the 2017 GE I had got so fed up with the constant carping by the remain lobby that I became a leaver. For some strange and unfathomable reason, being constantly disparaged as a thick, knuckle dragging Neanderthal has not yet convinced me to change my mind back.