That's not hostile, that's indifferent. Hostile would be if Apple implemented intentional blocks and safeguards attempting to prevent people from running Linux on M2. From everything I've read about it, it has been the exact opposite.
But they didn't provide any documentation, you are correct, so I wouldn't call it friendly or supportive. But I definitely wouldn't call it hostile either.
Looks like moving towards openness to me, because as far as I remember, there has not been such a high-functioning Linux distro on a Mac until Asahi. And implemented in such a short period of time, on top of that. Of course I wouldn't attribute it solely to that, the Asahi team seems to be doing a phenomenal job as well.
Also, I haven't seen Linus Torvalds use a Macbook (an M2 Air running Asahi Linux) until recently either.[0]
Huh, Ubuntu works perfectly on my 2010 Macbook pro. Including fringey stuff like keyboard backlight control and the ambient light sensor. Also sleep etc.
I didn't even have to mess with anything, it just worked right after the install. How much more high-functioning can you get?
100% towards openness. Before the move to ARM, Macs' security standing was an all or nothing affair. Either all the OSes that ran on the Mac had a secure boot sequence, or none of them did.
With Apple Silicon, you can keep a complete chain of trust with macOS and install an insecure Linux distro. It's great security compartmentalization, and no x64 chip can offer this granular control.
But they didn't provide any documentation, you are correct, so I wouldn't call it friendly or supportive. But I definitely wouldn't call it hostile either.