OP did not say he was offended, just disgusted. Like "haha gross, look at these shitty guys". Just like if someone starts making racist remarks, even if I don't personally believe they would murder a black person in the street, I will feel embarrassed for associating with them, and recognize that they are shitty people at the moment, and that is not a slippery slope to thought policing. That is how culture slowly fixes itself.
I don't know, where I'm from "disgusted" is a much stronger term than "offended". It's like a visceral repulsion that triggers something bordering on mild rage. I don't know how the OP intended it, but if it's as you describe, then yes, it's not too bad, but I haven't seen that term used so lightly usually.
To me disgusted and offended are unrelated. I'd personally agree that in magnitude of responses, disgusted is probably stronger, but, to me, being disgusted is about finding something to be awful, whereas being offended is like being hurt yourself. As a white guy, I am not offended if a racist guy talks about killing black people. I am disgusted, and hush the room and tell everyone to point and laugh at him.
