I always find it funny when fans, looking in from the outside, who obviously don't know anything about the relationship between this two try to insinuate shit like this between two celebrities. .
Buffon and Del Piero undoubtedly no each other very well and clearly have a good relationship. Even if you weren't keen on the comments, Buffon doesn't need you to defend him by angrily attacking someone who is his friend via twitter. The sheer stupidity combined with a need to feel involved and important of some people.
Del Piero is now a commentator, he was saying that he disagreed with buffon's actions as a professional. Buffon is not a child, im sure he is mature enough to not take it personally.