In what one observer called “a whole new level of insanity and paranoia,” renowned Israeli historian and professor Ilan Pappé—a staunch critic of Zionism—was detained and interrogated this week by Federal Bureau of Investigation agents as he entered the United States at Detroit’s airport.

In a Wednesday Facebook post, Pappé said that he was questioned by FBI agents for two hours after arriving at Detroit Metropolitan Wayne County Airport on Monday.

He wrote:

The two-men team were not abusive or rude, I should say, but their questions were really out of the world! Am I a Hamas supporter? Do I regard the Israeli actions in Gaza a genocide? What is the solution to the “conflict” (seriously this what they asked!) Who are my Arab and Muslim friends in America… What kind of relationship [do] I have with them?