The Koch brothers were well known libertarian philanthropists long before Trump became President, and I don’t recall him saying much of anything about them. They did their thing and he did his. They were hated and despised by liberals.
It may come as a shock to learn that disagreeing with you does not automatically make someone anti-American.
The koch bros opposes Trump. Apparently because they don’t want immigration control
The Koch brothers opposed Trump. Never forget that. Apparently they are for functionally open borders.
Does opposing American sovereignty make one anti-American? Good question