But to answer your question, in a scenario such as you have described I'd say that direct action would be justified, including violence against and killing of police, soldiers and other officials involved in the extermination of foreigners.
Right. And obviously, that's the answer that almost any reasonable person would give. But the reason I gave you that scenario was to demonstrate that 'more than 50% of the people voted X in a referendum' is not
by itself morally a reason for compelling the Government to do X. The Government should in the end do what - in its judgement - is right and best for the country (or in some cases, for the wider world). It makes sense for the Government to consider public opinion (as evidenced by a referendum) in making its decision, but it doesn't make sense for the Government to be bound by the results - because there may be reasons why following the result would actually be harmful, or - in the hypothetical example I gave - morally repugnant.
Obviously, you and I disagree about whether leaving the EU would in fact be harmful, but the point of this is to show that there's nothing really wrong
in principle with the Government saying, "
we've looked at the referendum result, and we respect that the vote has gone for X, but in our judgement, doing X is going to cause so much harm that we will choose not to do it". And by that reasoning, there's nothing wrong (and nothing anti-democratic) with those of us who believe that leaving the EU would be massively harmful from seeking to dissuade the Government from invoking Article 50. (After all, whatever the Government does, it will in the end have to face voters in a general election within 4 years).
And notice by the way that there is one similarity between my example and the EU referendum: In both cases, there are people would be harmed by following the referendum result. In the case of the EU referendum, no one is actually going to get killed, but it is likely that many people (including many UK citizens) will be stripped of their right to live where they wish to live, against their will. It's possible that some may even end up denied the right to continue living where they currently live. If you are arguing that that should happen purely because 52% voted for it, then that looks to me like a pretty strong example of the majority suppressing the rights of a minority - which as
TheKnightWho pointed out really shouldn't be part of a democracy. It's vastly different in degree from that majority choosing to kill a minority, but not different in principle.
If (hypothetically) the referendum had been on the question of whether all foreigners in the UK should be immediately put to death and had been defeated by the majority, but then the minority lobbied really hard and convinced Parliament to enact the Immediate Extermination of Foreigners Act, what would your response be?
Obviously my response in that situation would be to do whatever I could to protect the foreigners, to argue against the minority, and to seek to persuade the Government to do the 'right' thing - which in this case would involve following the referendum result.
But the key thing is, the reason I would be arguing against the minority wouldn't be because of the referendum result - it would be because I believe their position was wrong. I would be arguing against those wishing to kill foreigners just as strongly, no matter what the referendum result happened to have been.