Well what is the purpose of his hypothesis being disavowed and other scientists dismissing it as racist drivel? Is the purpose only to hurt the man or is it an attempt to limit the damage his hypothesis could potentially do to minorities?
Good question.
I would suggest ultimately neither.
This is the ultimate reason for the ostracizing.
Public outcry over these remarks prompted Cold Spring to ask for his resignation.
I think it's easy to assume the science community is akin to the hyper-humanitarian scientists we see in those old 50's sci-fi movies. They never have any self-interest, arguing over which one will get to be the movie's hero and risk their lives in a rescue attempt, etc.
This is a fantasy. The science community is not any different, except in topic/subject, than any other vocational community. They're subject to public approval.
The truth seems to be that the majority will never change racist circumstances without a public outcry, starting/especially with the minority victim. During the U.S. racial segregation period, white majority America still considered ourselves humanitarians. The segregation was evidently considered normal by the majority. It didn't impede our view as saviors of the world. It's very possible that had their not been a Civil Rights Movement, segregation might still exist today (to the magnitude of pre-CRM segregation). If minorities were content with lower status and treatment, the white majority would remain satisfied as well.
More recently, while the black stereo-types in movies have been removed (although replaced with exploitation stereo-types), America fully accepted the stereo-typing of Asians. There's been recent improvement of Asian depictions in movies. Why? Because of Asian empowerment groups challengeing our media.
What doesn't seem to happen is White majority in western nations volunteering to remove racist manifestations on our own. Do you think that without the public outcry, the science community is so humanitarian-focused as to demand justice for peoples who accept injustice upon themselves?
Basically, what we see here is "jumping on the bandwagon".