I have no problem with cardinals (or frankly, anyone) raising questions about the Church's teaching.  I find it disingenuous at best that Burke Inc. would not have tolerated other prelates "raising questions" to JP II The Magnificent or Benedict XVI.  I would strongly suspect that the same posters defending Burke Inc. for "legitimate questions" would not support, oh, let's say, the "Nuns on a Bus" when they raise questions about Church policy and leadership.  Just a hunch.