Norman Finkelstein has an addiction to media attention. He is constantly pushing the envelope to gain media attention. Now that he has been denied tenure every few weeks he needs to pull a stunt or two to remain in the news and keep his speaking fees high.
Finkelstein almost certainly knew after his highly publicized meetings with Hezbollah he would be questioned by Israeli security. Moreover, Hezbollah is a terrorist organization that has carried out a series of terrorist acts in Israel.
Finky, Chomsky and Kovel are just part of the communist anti-semitism industry. These dedicated communists have made a career out of catering to Populist anti-semitism and have reaped lucrative financial rewards for careers of mediocrity. Thus if you are a communist and your record on Jews is akin to the Brownshirts of the 1930's have no fear Finky will make your bigotry socially acceptable.
I am surprised the publicity hungry Finky did not claim the Israelis waterboarded him. Such a claim would boost book sales and get him in the news. Finky is not above knowingly making false claims to get media attention such as writers not writing their own books or making false claims about books availabilities in Yiddish.