I fail to see how Scott even attempted to defend the policy. He said he believed it to be a mistake.
I know you addressed this to Scott and not to me, but I can't help but wonder what you think either he or I could possibly do to make up for the pain and heartache caused by a policy we would never have implemented in the first place. I'd also like to know how you think either of us (or any Latter-day Saint, for that matter) should go about changing the LDS leadership or "the system." It's easy enough for a non-Mormon to tell us that we need to be pro-active, but from a practical standpoint, there really is nothing we can do to change a system that is not based on the democratic process. When I believe our leaders have made mistakes in the past, I've always been willing to say so, and it sounds to me as if Scott is willing to, too. I'm just saying that it's really pretty pointless for someone who doesn't know how the system works to be saying that the lay membership of the Church ought to do something to fix it. All we can do as individual Mormons is be honest about these issues (which I believe we have been) and try our best to live the gospel of Jesus Christ as we believe it should be lived. We can't force the Church's leadership to change. Period.
You might not be able to force the LDS leadership to change, but you are able to decide how and whether you participate with the LDS Church. Nobody has put a gun to your head. Your membership in the Church and your acknowledgement of the authority of the Church's leadership is a choice of you and you alone.
You and Scott say that you disapproved of this policy... but you stayed. What I take from this is that neither of you felt that the policy was bad enough to make you leave.
Also, I question how powerless individuals Mormons really are to change Church policy. The LDS Church has reacted to threats to its strength and power before; if it was willing to get rid of polygamy in response to government seizure of Church assets, maybe enough members refusing to tithe would have changed their minds about this racist policy (or other objectionable policies) much sooner.