Brexit is a Conservative attempt to overturn the internationalist legacy Jews have so heavily relied on. Why then does our communal leadership seem unbothered by it?

I am a musician and Jewish community organiser, currently studying for a PhD in British Jews and Race Relation since 1945 at Southampton University.
Brexit is a Conservative attempt to overturn the internationalist legacy Jews have so heavily relied on. Why then does our communal leadership seem unbothered by it?