//People who don't want to support a No Deal Brexit, given all the signs that it will be harmful, are far from collaborators. People who still think Remaining in the EU is best for the country are not collaborators either.//
Don't disagree with any of that and certainly don't impugn the honour of anyone who is a Remainer.
But people who have that honest conviction will act in a morally consistent way. For instance, they would not do either of the following:
(1) expose the country to economic disaster by voting for a referendum given the stupidity of the electorate, and the power of populist demagogues like Farage.
(2) vote to trigger Article 50 which set a two year absolute deadline on our leaving the EU, irrespective of any arrangements which might or might not be agreed between the EU and the UK in the interim. As was pointed out by Cameron, Osbourne, Grieve, Hammond etc at the time: the default is that we lose EU preferences and are forced to trade on WTO terms.
Voting for either one of the above would make the country's future prosperity hostage to fortune. And no principled politician would take the risk of allowing an ignorant, ill-informed and easily influenced electorate to decide such an issue of moment.
So the Remainer who has done either one of these (and let's face it, they all have, to a Hammond and a Soubrey, done both). These are not the the principled people person described in Jim's post.
PS: dare say we could have a thread about what constitutes "honesty". I would have thought it's the kind of thing most of could agree about, but obviously not.)