Bizarre Claims that Newt Gingrich was anti-Reagan?

Michael Reagan endorsed Newt.
Might there have been disagreements from time to time, sure. But to claim that Newt was rude to Reagan or anti-Reagan seems like a very strange claim. If this was believed, would Newt have been in the Republican House leadership in the early 1990s? Here is Newt on the subject on Hannity's show.
UPDATE: LIMBAUGH blasts coordinated attacks on Newt: "I first heard of Newt Gingrich when he was perhaps the premiere defender of Ronald Reagan. This was in the early 1980s of course, Reagan assumed office in 1981."
UPDATE: From Sarah Palin:

"Look at Newt Gingrich, what’s going on with him, via the establishment's attacks,” fmr. Gov. Sarah Palin said on FOX Business. They’re trying to crucify this man and rewrite history, and rewrite what it is that he has stood for all these years."