You are not your job, and prepare yourself for listening to honest criticism of the things you base your identity around or you will find it very difficult to learn and grow.
What was rude and, frankly, hateful, was the call to demote or lay off all C++ programmers.
Funny thing is I'm a C++ programmer myself right now as I mentioned :) Even if we decide to "deprecate" C++ today, Google alone would have large enough C++ codebase left to maintain for the next two generation of programmers.
So no, I don't think it means we should demote or fire all C++ programmers -- but at the same time I'd like to note that as a programmer no one should be married to a single language -- languages come and go.