I think the way you define "national treasure" is interesting.
I don't think you should be kicking anyone from the clan, including Addy. It's your clan, do whatever the heck you want with it. That being said, if your members act toxic with a high enough frequency, and there is no statement that's like "hey, that was a mistake" or "hey, the MASTER clan doesn't support these actions" then your clan is essentially endorsing that toxic behavior.
And maybe that's what you want. Based on what you said, it does seem that being non-toxic members of the community is not something you "care" about. I think that's a pretty horrible look for the clan that presents itself as the "master" clan but that's totally up to you. It's totally within your rights to be toxic pricks. And it's totally in the community's rights to judge you for being toxic pricks.
It's ridiculous when players like Addy the Dog can do whatever he want and that new players have guidelines to be in the Master clan at all. Even if there not any hard creteria at all.