
The Spain skipper has spent his entire professional career at the Santiago Bernabeu, winning three Champions Leagues trophies and La Liga five times amongst a host of other honours.
However, a slump in form over the last couple of years has seen him become the target of jeers from the stands but Buffon has leapt to his defence.
"There are certain iconic figures who don't deserve this attitude," he said at a press conference.
"It is an unpleasant and outrageous thing for a professional like him, who has always given his all. The protest against him is an unprecedented gesture from ingrates.
"For 20 years he has given so much for the Real Madrid shirt. Regardless of whether things are going well or not, there are icons who don't deserve this kind of treatment."
Juventus travel to Madrid on Wednesday with a 2-1 lead from the first leg of their Champions League semi-final in Turin last week but Buffon says their job is only half done.
"We have gone beyond our expectations. We are 90 minutes from the final," he continued.
"I'm more mature now than when I was playing in the 2006 World Cup final in Berlin but it's still too early to dream about going through to Berlin."