Mexico Gets a Place in Lawsuit?

Read This Article! I do not understand why we are allowing another country to take part in a lawsuit about border related issues. I also do not understand why Arizona is getting so much flack in the first place. The United States seems to be the only country that has trouble standing up for its borders. You enter any other country illegally and the instant they catch you, you are shipped out, put in jail, or killed. So why is it that fingers are being pointed at America? And why do we care so much about what people think, when the main finger being pointed at us is the same country the illegals are coming from? Of course Mexico doesn't want us to close our borders. Then the leaders would have more people in their own country to take care of and less of our money to take care of those people. For once, Mexico should do her own dirty work and stop dumping her problems on us.