There's a little more than is being reported. Here's some other RMS lines in the same thread:
First we have:
"More precisely, Apple intends LLVM and Clang to make GCC cease to be a
signal success and a reason for all sorts of companies to work on a
compiler that always gives users freedom. That would be a victory for
Apple and a defeat for freedom.
I don't know what LLDB is, or what it might do. I am going to find
out."
That's a little bit paranoid, but it is still a cautious statement.
Then:
"This question is a small part of a big issue which is more or less bad.
I want to find out what it is, and think about it. Please do not ask
me to rush to a conclusion without finding out what is happening."
Again, in all of his posts he mentions wanting to discuss it a bit more. RMS is pretty incendiary, eccentric, and often does or says crazy shit but... in this case it sounds like he said something alarmist to get attention and try to get some discussion, without stamping his foot down or flipping his shit. That he's being selectively quoted to make news is bad juju.