Because it might be their last chance. Remain at least theoretically becomes more popular by the day as more young voters come of age, No Deal will always have the vast majority of parliament against it and trying their hardest to thwart it and this or May's deal are the only deals they can get without giving up some more red lines in negotiations.
German TV interviewed some Leave voters about Brexit. They are very conviced that everything will get better after a No deal Brexit and the media are only doing fear-mongering.
Take back control
A referendum cannot be held without the cooperation of the government. The Johnson government would throw absolutely everything they had at it to gum up the works.
It seems so, yes. That's been signposted for a while now though. Of all the parties or polities that have some kind of stake in this deal, the DUP's long-term position is the weakest. The other players - the Conservative Party (and, separately, the ERG), the EU, Ireland - none of these are likely to be in a radically different position within a few years. The DUP's current position of political strength within Westminster ends the picosecond a new election is called.
Brexit voters aren't really known for "thinking" or "following facts"
Never hearing from Sammy fucking Wilson again is the only good thing that will come out of an election.
The government can't argue that it's this deal or no deal though because they legally need to ask for an extension.
It's best not to put too much faith in Tories voting against it though. Grieve, Greening and Bebb are the only ones I'm pretty sure will vote it down, as they did MV3. The problem with Tories refusing to back it is that their choices are pretty much this deal, no deal or a Labour/remain coalition government. The likes of Stewart and Gauke want to leave with a deal. The only reason I see Stewart voting it down is because passing it might hurt his chances as London Mayor. Hammond still wants the Tory whip back so will probably back it. Rudd could go either way.
