torture memos

This past week the Obama administration released a few memos from the Bush administration detailing what types of torture were acceptable and how extensively these torture (er...enhanced interrogation methods) could be used. Numerous high profile Pentagon and CIA officials have gone public with their disagreements on this subject.

I have two questions:
1) why were these memos released?
2) why the objections?

My guesses, is Obama is making a purely political move to try and propagandize against the Republican Party. He is nearing the end of his honeymoon and his approval numbers are dropping as the national public is starting to realize that he is in fact, just a man, just a politician. Obama may still do a lot of good in the next 4 or 8 years. But he also might screw everything up even worse.

If Obama wanted to make diplomatic amends for the actions taken at secret prisons during the Bush administration, then release all the memos, release all the information, including what was confessed as a result of the torture. But he doesn't want to do this, he only wants to let out the information which looks bad for the Republicans.

This is a political move, nothing more.

On the other side of the coin...why the objections? Here I figure the answer is simply a desire to keep important information private. Information is perhaps the most powerful weapon in a war. The less the enemy knows the better. America waterboarded, I know it, you know, they know it. Releasing these memos only gives knowledge to the allies of those who were waterboarded.