Whatever Buchanan wants or does not want doesn’t change the fact that our nation is being bled and bankrupted by a messianic urge to defend all and remake the world that is closer in philosophy to Woodrow Wilson and FDR than it is to George Washington.
Meanwhile, bleeding America in a messianic crusade during the Cold War was tickety-boo. It's just too bad those nasty old Israelis had to show up on our side.
Some people have a knee-jerk reaction to the name "Buchanan," and seem to hate him more than any leftist Democrat or liberal Republican. It makes them completely incapable to arguing the merit of his ideas, so you get ad hominem instead.
So don't expect a straight answer for how the GOP went from being the party of rational non-interventionism in the early 20th century to crusading Wilsonianism a century later.