So is Bob feet a disgrace to all mandalorians?
You know han was bragging how he kicked his ass and he could not see.
Just like this Mando, Jango wasn't born a Mandalorian. He was adopted into the culture and during their times of peace he broke out and became a bounty hunter, THAT led to him being an outcast/disgrace already - Boba was probably never respected by Mandos, I doubt he ever really had contact with them.
This is addressed in the Clone Wars cartoon, where the Mandalorians are when Jango Fett's name is brought up
Boba took jobs from gangsters and the Empire as well, which was even more disgraceful. They might've respected that he was feared, but that's where it stopped.