For starters, it unleashed a wave of resentment within the Muslim world that led to the violent radicalization and production of jihadist terrorists. The US's invasion of Iraq, to many, was seen as proof that America was going to war with Islam. As a consequence, many young Muslim men took up arms and strapped bombs to themselves in what they felt was a justified defense of their faith against crusaders and traitors.
Define these terms.
One fluently.
It actually costs more in the US to sentence people to death over sentencing people with life imprisonment. Death is kind of a big deal, it being permanent and all, so death row inmates are entitled to appeals to overturn or downgrade their penalties that can last for many years and rack up a fortune in legal fees.
Our Western allies would be less willing to cooperate with, or at least accomodate beyond the strategic, any party that they have passionate ideological disagreements with.
The Joker.
I am not a grape.
Depends on whether or not you want to become friends with these people. As far as just working with them is concerned though, you have to anticipate how future actions by these people will be informed by their intentions, and whether or not those anticipated actions match closely enough to what you want to see happen.
It depends, in part, on whether or not the story/show has been thematically conclusive.
To various degrees, if what you mean is "mature."
I would imagine that he's trying to find a balance on the issue. The humanitarian side of him would want to enfranchise undocumented migrants that have been living in the US for years and decades on end. The lawyer side of him recognizes that these immigrants still came here illegally.
It's also to Obama's (and the Democrats') political advantage to provide easier paths to citizenship to these undocumented migrants. These migrants tend to vote Democrat, after all. Republican opponents would and have naturally criticized Obama's and the Democrats's desire to make this happen a cynical political ploy to stack the electorate against their opposition's favor. Obama thus came up with the compromise you mentioned.