What does Galatians 3 say about those under the works of the law?

Les teaches that Galatians 3 says, “For as many as are under the works of the law are under the curse of God.” He emphasizes that the word “curse” is more than just puncturing a voodoo doll with a needle; it is being under the curse of the Almighty. He explains that many people are supposedly law keepers, supposedly keeping the commandments, and thereby think they are pleasing God, but they are not pleasing God—they are placing themselves under the curse. Les connects this to Deuteronomy 27, where he says the passage deals with the horrible things mankind can do that bring down the wrath of God, and he notes that this is what Paul is referring to in Galatians. He also points out that our Bible tells us Christ was under the curse of the Law.