As an example, some parts of the internet ostracised Brendan Eich for a personal donation he made to support a Californian ballet proposition on same sex marriage; forcing his resignation. There were no complaints about any of his behaviour or actions at Mozilla whatsoever.
That's not a good thing to be doing.
As another example, the recent Stack Overflow changes where a controversial, over-empathsised policy change on respecting pronouns (also pretty much a non-issue, I have never seen pronoun complaints come up on Stack Overflow) has forced multiple community moderator resignations and a widespread community revolt.
These changes are often negatives for the projects involved.
What to you may be just another opinion is another's legitimacy of them being them.
Maybe it's because I see myself as a progressive, I understand why people were mad at Eich and petitioned his removal. Him being the face of one of the biggest tech companies in the world actively working against your best interests must be hurtful. In my bubble it's absolutely normal to be gay, gay marriage is also nothing to be frowned upon, my country (NL) was the first in the world to legalize it. I realize a large portion of the rest of the world sees it differently, but I'd place it in the same category of a CEO donating money to the KKK or other extremist groups - should black people just think well hey he's doing a good job right? Who cares he's funding a group that actively detests me not for who I am but the color of my skin? Just like gay people think he's funding a group that detests me for something that isn't even my choice?
I followed the SO debacle and what I gathered from it was that there were a couple of individuals who made some very very poor decisions, ruled with an iron first, and any dialogue was not only suppressed but the mod in question was booted in such a despicable way that the rest of the community followed. I don't think they're comparable.
Ironically, progressives say this piously while failing to extend it to those with conservative (or even moderate) beliefs or religious beliefs.
(For the record, I am a non-religious classical liberal, part of which means I am against the intolerant aspects of progressivism.)