Earlier quoted context omitted.
How have they sabotaged HTML Audio?
By not supporting Ogg Vorbis on Desktop and totally fucking it up on Mobile on purpose: http://www.phoboslab.org/log/2011/03/the-state-of-html5-audi... (Year old, but still valid)
Apple have been fairly supportive of WebGL: it's been in the WebKit nightly builds for almost three years now, of which Apple are a major contributor. You can accuse Apple of many things, but given how they've been part of the WebGL Working Group from its formation I'm not so sure you can say they're out to 'get' WebGL...