Critter's saying that if the EU starts playing hardball with the UK nationals in the EU, the UK would be in the stronger position if they hold the EU citizens in the UK hostage/retaliate against said civilians.
Let me try again.
That there highlight is pretty significant. Its not a one lane road to hell.
D... do I really have to explain why trying to play chicken with three million lives against an entity that's roughly ten times your size in population and near that in gdp is a bad idea? How that body of civilians would not be something that puts them in a stronger position, but a yoke around their neck the UK would have to handle with kids gloves or be driven into the ground by likely considerably more than just the EU?
The problem is not just that it's a morally repugnant suggestion. It's also that it would so massively,
incredibly stupid that it's somewhat amazing the person that made it is not literally clinically brain dead, somehow managing to unintentionally spasm in such a way to produce the sounds we heard. Those are not the words of someone describing a two way road to hell. Those are the words of someone whose ability to consider political repercussions could be accurately described as, completely non-metaphorically, suicidal.
E: Credit to the... house of lords, I think? That this was one guy and he was basically booed off stage. Probably shouldn't downplay it, that colossal dumbfuck was more or less singular, and probably shouldn't be a indictment against the rest of the UK body political (well, except maybe against UKIP both for letting the critter talk and having 'em be one of their representatives to begin with). But holy bloody hell.