Why is the onus on me to be aware of what every sub group considers offensive? Why isn't the onus on the sub group to recognize that they are a minority and that not everyone around them has to meet their standards of what is and isn't offensive?
If you don't care about being respectful, don't bother finding out.
There may be consequences if you don't, there may not be. Me, I want to be respectful, so I start with a safe neutral ground and go on from there.
I fear that the swing in PC culture is going to cause more harm than good for "inclusiveness" now that the pendulum has swung too far.
Most people have a thick enough skin to get over it, so the people around them don’t all have to adjust to their feelings.
Sure, people do have thick skins mostly, but you shouldn't rely on that. Again, it's just about being respectful of people.