I don't know much about Dave Ramsey. From what I'm reading here he sounds like a jerk. But generally speaking every person has their bad side. If you're a public figure it's going to be brought into high relief. Also, if you're not pissing SOMEBODY off in the course of this life you're probably doing something wrong.
One thing I do like is the MMM forums. They're a uniter, not a divider. Whatever ideological, political, philosophical, and religious baggage people have they are linked through the common cause of frugality, freedom from debt, mindful consumption, and a desire for financial prosperity.