So you're taking offence to one of the few artists who actually takes a stance on a topic? Are you trying to discourage actually having an opinion? You certainly won't change his mind by taking shots without him knowing. Whether you're right or wrong, I think he'd be able to defend his opinions solidly if you talked to him in person. Also, since you're attacking him personally, this doesn't belong in Music & Sound. This belongs in Null, because it has no purpose.
I personnally disagree with most of the arguments you've made, FYI.
Here's how your letter reads to me:
Dear rock star who will never read this letter, and whom I have never spoken to previously,
Here's some bullshiz from the point of view of exactly the type of person you hate. Here's some more. Here something irrelevent. And here's some more bullshiz.
Sincerely,
Someone you'll never meet
Your statements are hollow, your methods are ineffective, and you're still annoying. You havn't changed a bit