Well I think the point is that Malinga's not breaking the law, but his unique action helps him. I think it's the same for Mitchell Johnson, who is a bit round arm himself and it seems batsmen fish after the ball a bit more frequently when he's bowling. Casting aside the throwing issue - then I think Murali would have been similar. Just something unique in his action that throws off the batsmen just that little bit. Paul Adams wasn't particularly good, but got a lot of wickets because of his uniqueness.
Anyway, I don't see why it's a reason to look down on someone. A) it's hard to measure what advantage these 'weird' bowlers get - so to say they get some advantage is an unmeasurable claim - might be true, but no one can prove it, and B) the fact that these guys got to the top despite their unorthodox style is actually a great reflection on their determination and ability to defy coaches and critics.
Anyway, I don't see why it's a reason to look down on someone. A) it's hard to measure what advantage these 'weird' bowlers get - so to say they get some advantage is an unmeasurable claim - might be true, but no one can prove it, and B) the fact that these guys got to the top despite their unorthodox style is actually a great reflection on their determination and ability to defy coaches and critics.