Re: Thin end of the wedge?
That's a bad analogy. It describes purposely using the term of a group of people in a way to imply it's bad.
It's actually completely different to using a word with an innocent meaning in context, for an innocent purpose, and then banning its use because it can be used elsewhere to describe a negative meaning.
To follow through on your example, surely we need to now ban the word "Jewish"? The fact that we don't is actually more helpful to the opposite point of view that you were trying to defend.