Trust who you like. Learn from who you like. If Marx wrote a book promoting capitalism as good, would you believe him? Then why would you trust a person who writes on saving America by a person that promoted a man whose whole career was one big act of opposing what it stood for?
I did not use the word trust in my post. I said “learn from”. From reading Marx I learned to identify Marxism. From reading Alinsky I learned ways to recognize his techniques. I trust neither of them.