Boo-hoo, let me play you the world's smallest violin for Apple's "suffering". Apple is the richest company in the world, it has more money than God, they can fend for themselves just fine, why should anyone shed a tear that someone is stealing from them?
People are defending others stealing from Apple because Apple has a history of stealing from other companies and developers as well, so it's just karma.
Though you'll have to enlighten me what exactly it is they are stealing from Apple since Apple doesn't charge money for iMessage for there to be any theft or loss of revenue for them. Unless your definition of theft is "YOU WOULDN'T DOWNLOAD A CAR?!"