He did break the 11th commandment of "though will not say anything negative about another talk show host" and it has cost him dearly.
Trumps style is very similar to Savage. They both get worked up, when they believe what is said is right, when compared to someone who is far left. They can both talk the unique New York language and both know how to street fight. The members of the Republican establishment refuse to fight back. They will run away from a bully. Trump and Savage fight back and will expose the bullies. A large group of voters appreciate chutzpa. Some of those voters are also Democrats.