Immigration and the Supreme Court

I have to be honest, when it comes to immigration, I tend to lean more on the conservative side. I completely disagree with big amnesty programs because I think it screws those who have been trying to immigrate legally, and it just tells others that if they come here illegally, don't worry, eventually amnesty will be granted. I am also on the fence about President Obama's new policy when it comes to deportation. How is someone supposed to prove that he/she has been in the country for as long as necessary to stay? It seems a little too easy to fudge. I also feel like he made this policy solely because of the election, and that's disappointing to me. At the same time, I do think we need comprehensive immigration reform, and Congress will never do such a thing while it is a Republican majority with a Democrat in the White House. All that being said, I think the Supreme Court totally erred this week. I'm happy they knocked down 3 of the 4 provisions of Arizona's law, but the part they left intact was the worst part and it makes no sense, especially in light on what they knocked down. I mean, if a State cannot require someone to carry immigration papers, what happens when the cops pull someone over, let's be honest-most likely solely because they look hispanic, and he or she doesn't have any proof but claims to be anAmerican citizen?. Can a cop jail that person because he/she doesn't believe him/her? What happens if the arrested person lies? How do they prove that? Now I do not think immigrants should be required to carry papers,  its completely degrading, but if you are going to uphold the right of the police to question someone's immigrations status when they are questioned for something else, I want to know how you get the true answer without requiring people to carry papers. I suppose I could read the entire decision and maybe see something that explains this, but I don't think it should be that difficult.This is just another example of our Supreme Court effing up in my mind. And don't even get me started on these Supreme Court Justices. For so called conservative judges, who generally prefer to leave precedent alone and let Congressional law stand, these folks, and by these folks I mean Roberts, Alito, Thomas, and Scalia, are the most activist judges we have had in a long time. Ugh. For a former law and society major, this is so not cool.