for hard Brexiteers, taking back control of the UK borders to limit immigration is a major outcome of Brexit
For some of them, maybe. But certainly not all; many of them are globalist libertarians with no desire whatsoever to reduce immigration.
A few points:
- "Global Britain" and "go global" were key Leave slogans.
- Only one-third of Leave voters cited immigration as their main motive in Lord Ashcroft's exit poll.
- Many key Leave supporters are pro-immigration:
- cabinet member and one-time PM contender Michael Gove speaks approvingly of Britain's "liberal approach" to immigration
- other previous PM candidate Boris Johnson has called for an "open approach", "clashed" with Remainer Theresa May due to his defence of immigrant rights, and called on the government to make a "liberal" case for immigration.
- yet another PM contender, Daniel Hannan, the Secretary-General of the biggest EU-skeptical EU conservative party, is a pro-immigration liberal who has written multiple articles denouncing Remainer claims that Brexit was motivated by a desire to restrict immigration. (One example.)
The narrative that the Brexit vote was motivated by a desire to reduce immigration is common on the pro-Remain Left, but for actual pro-Leave politicians it's often either a secondary objective or something they actively oppose. There's no need to explain why these people are taking positions that go against their values, because they don't go against their values in the first place.