Really?!? Am I imaging post 12026 in which you make the following statement (direct quote):
"The centre left/right are inherently internationalist, the extremes of the left and right are not."
If that isn't making a claim about the extreme left (i.e. that they are not internationalist) then I have no idea what it is.
The extreme left can be internationalist, in fact my statement there was partially wrong. Neither the centre left or centre right are inherently internationalist.
This is from Wiki on JC:-
In the 1975 European Union referendum put forward by the Labour Party in the United Kingdom, Corbyn opposed Britain's membership of the European Union (EU).[197]
Corbyn also opposed the ratification of the Maastricht Treaty in 1993, saying: "... the whole basis of the Maastricht treaty is the establishment of a European central bank which is staffed by bankers, independent of national Governments and national economic policies, and whose sole policy is the maintenance of price stability[.] That will undermine any social objective that any Labour Government in the United Kingdom—or any other Government—would wish to carry out. ... The Maastricht treaty does not take us in the direction of the checks and balances contained in the American federal constitution[.] It takes us in the opposite direction of an unelected legislative body—the [European] Commission—and, in the case of foreign policy, a policy Commission that will be, in effect, imposing foreign policy on nation states that have fought for their own democratic accountability".[198][199][200]
Corbyn also opposed the Lisbon Treaty in 2008[201] and backed a proposed referendum on British withdrawal from the European Union in 2011.
Again you seem to have been puzzled why Labour haven't changed policy, I've given you a reason