Most of "examples" that were in circulation for past days were usually misunderstood jokes that others made at his expense. Seriously - how can one treat somebody mentioning "if he ever hits on you, just tell him you use vim" as an example of what's wrong with rms seriously? Stories about plants being kept by female professors just to scare him away? Please. You need to be completely missing the context to interpret it even remotely close to how it's being used now.
If you're too lazy to do the research yourself, I've even found a page that collects it and does proper justice to objectively present them in full context: https://sterling-archermedes.github.io/ (although this text could do just as well with a few less "paid to write, not to read" repetitions...)
Either way, I'm not really in a mood to educate you.
What exactly are you claiming he did to harass people?
What exactly did he do that was inappropriate?
You know all the people on Twitter claiming that "numerous" women have confided in them that Stallman kept them out of tech? It's all fake. These claims are identical in structure and purpose to Joseph McCarthy's famous "I have here in my hand a list" line. What the mob is doing now to Stallman is exactly the same thing that the mob did to everyone suspected of communism in the 1950s.
And regardless, this behavior has apparently been going on for decades without anyone taking action. Can you blame people for thinking that "the right channels" aren't working?
So people eventually share their stories through social media and even that doesn't work sometimes (see: Riot). His behavior doesn't have to cross into illegality to be reprehensible.
MIT could likely get into deep trouble if they chose to publish all of the formal complaints against Stallman for obvious privacy reasons and this incident could've just been the proverbial final straw.
And regardless: Apply Occam's Razor here. What is more likely: A group of random people consisting of professors and students bringing grievances against Stallman, or some sort of conspiracy where all of those people are lying, embellishing etc for some form of revenge? If multiple disconnected people are calling someone an asshole, maybe there's an issue here. It's amazing to what lengths people will attempt to create a narrative defending RMS.
A group of random people with a certain radical ideology, most of which work at google[0][1][2], the military[3], or have personal issues with him due to their history[4][5], etc. I certainly do not believe that it is a conspiracy - ie they are being honest on the fact that they do not like him (not necessarily on why they do not like him though) and that they are not being paid by someone to do it, but they are far from random people.
Also, I personally saw no professors being involved, although I might be mistaken.
[0] https://medium.com/@thomas.bushnell/a-reflection-on-the-depa...
[1] https://twitter.com/mjg59/status/1172422966904160257
[2] https://news.ycombinator.com/item?id=20995556
[3] https://news.ycombinator.com/item?id=21090851
[4] see 0 and https://en.wikipedia.org/wiki/Thomas_Bushnell#GNU_Hurd
[5] https://twitter.com/migueldeicaza/status/1173981287037751297 - https://en.wikipedia.org/wiki/Miguel_de_Icaza#Advocacy_of_Mi...