He's a public persona and was initially picked for a high-visibility position at Mozilla. While he's free to donate to whoever (or more generally, do) as he sees fit, the org is equally free to not want to be associated with that.
In the case of positions that aren't in the public eye, there's more of an argument to be made (although even there, there are lines where you can argue that a contributor doesn't align with the values of the organization depending on what the disagreements are), but if he's meant to represent the group, the expectation of privacy is different.
He's a public persona and was initially picked for a high-visibility position at Mozilla. While he's free to donate to whoever (or more generally, do) as he sees fit, the org is equally free to not want to be associated with that.
In the case of positions that aren't in the public eye, there's more of an argument to be made (although even there, there are lines where you can argue that a contributor doesn't align with the values of the organization depending on what the disagreements are), but if he's meant to represent the group, the expectation of privacy is different.