You are still talking as if atheist are part of some big community with shared rules, structures, ways of seeing things and so on. They aren't. The behaviour if one atheist doesn't reflect on other atheists. As has been said, the alleged behaviour of these atheists has no more impact on other atheists than the alleged behaviour of, for example, Kevin Spacey. Such behaviour is deplorable no matter who engages in it.
I am not that naïve but I think atheists would rather be seen as unified than disparate which unfortunately, the Krauss/Silverman affairs has left it with some actively denying, some wishing play down some reluctantly going public and others showing relief that some kind of cat is out of the bag.
A close reader of the thread would have spotted that there are I believe implications for public atheism in terms of Who knew, what did they know and what they knew about it and many organisations such as American atheists, American Humanists, FFRF, Center for enquiry have publicly dissociated themselves from the individuals concerned.
One must question though other organisations such as Humanist UK and NSS whose websites seem completely oblivious to the issues. This IMV is puzzling since HumanistUK celebrated Krauss as the speaker at their Darwin Day Lecture in 2017 on their website.
Also we must ask whether Dr Krauss is still an honorary associate of the NSS. When I try to access his biography on the list of Honorary Associates I get directed to the home page.
Finally Maeght I think we ought to question the ability and desire of atheists who are represented corporatively to fragment into an unconnected population of individuals when trouble brews as expressed in your statement.