liberal used, long ago, to mean rationalism and individual liberty. I fail to see how that has anything to do with internationalism. But the real problem is that this is just another leftist trying to overwhelm us with language the meaning of which is beyond the author or anyone else for that matter.
Yeah, like Thomas Jefferson.
... just another leftist trying to overwhelm us with (meaningless) language...
Perhaps I can translate for you...
a forceful defender of liberal internationalism
In traditional English: George Soros' Homo butt boy.