I would not hesitate to refer to any prophet or apostle as an apostate if they ever publically support the Democratic Party of today
And this is the caveat we keep butting heads with in all these kinds of discussions, over and over again.
Faust, Brown, and other Democrats among the Brethren were from another generation and another Demorcatic party. There is much to disagree with, from a conservative/libertarian perspective, with that old New Deal era Democratic party, but most in that party, up well into the sixties, still shared core American values and ideals with a substantial portion of other Americans, including most Republicans.
The post McGovern Democratic party, however, is, at its very foundation, a very different party from the one I knew as a child and my parents and grandparents knew in their day. The present party's central philosophical premises are quite different from many in the old liberal coalition of the JFK era and in severe conflict with the founding principles and documents of the nation. Again: the modern Demorcat party, and particularly its leadership, is best understood as an indigenous Fabian socialist party, incorporating both political and economic collectivism with social radicalism.
In a deep and pervasive sense, the party can, indeed, be understood as "anti-American, having essentially rejected the original classical liberal ideas of the founding for traditional continental, Franco/Germanic ideas.