OK, let's take a look at this whole mess from the "intent of GPL" angle (I'm no lawyer, and won't play one here either). Directly from the free software definition by the FSF, which presumably is authoritative on what GPL means:
What Red Hat is doing is giving you those four freedoms with respect to the kernel they ship, and then some. The whole flamefest is around if freedom 1 includes the right to be told why some part of the program is written (or was modified) the way it is. But the four freedoms are completely silent about this matter, the "learning" part is a job of whoever gets the program. Note that the "availability of source code" is considered a precondition for being able to study and modify the current version, nothing else.
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