This isn’t a new thing by any means - it’s important to understand that what we can do can be politicised, and that absolute tolerance can be easily gamed by the intolerant:
https://en.wikipedia.org/wiki/Paradox_of_tolerance
So far, De Goes has shown through his actions that he is at the very least, naive of this, and is willing to dig his heals on this, and at worst and enabler of the intolerant, and it’s good of Skillsmatter from distancing themselves until he figures this out. He’s still perfectly able to express his views in his own time, but I’d certainly be wary of attending conferences that invited him as a keynote speaker given the positions he currently holds.