Why do Tigers fans say Miguel Cabrera is a top 3 1st basemen?

I always hear from Tigers fans how great he is. He's a great player but they say he's a top 3 1st basemen in baseball. Albert Pujols, Mark Teixeira and Adrian Gonzalez are better than him. You can als make a case foe Joey Votto, Ryan Howard and Prince Fielder. Why do Tigers fans overrate him for?