Harvard Law School professor Alan Dershowitz said Sunday that the conflict with Iran represents the most critical global threat since World War II and warned that failure to act could result in mass destruction. "This is the most important war since 1939, since Nazi Germany," Dershowitz said on Newsmax's "Sunday Agenda." "If Iran is allowed to develop nuclear bombs, [it] will do what Hitler did, and there will be millions and millions of deaths." Dershowitz also pointed to the reach of Iran's weapons as a growing concern. "We now know that its rockets can reach Europe, and ultimately, the United...