Who is Dave Ramsey and why some people seem to dislike him?

His advice to folks who are drowning in debt is to have food, heat, a roof, and your basic needs met first. He is crazy! about finding ways to graduate debt free from college. He went bankrupt when he was 28 and made huge mistakes so there is that.
I do not find his message important to me in my life at this time, and I do get a huge amount of satisfaction about the parts of his advice that I figured out myself 30 years ago on my own. He brings up Christianity from time to time. But it is secondary to being in a good place to feed your family and have emergency funds. It is just a fun radio show while in traffic.