Can we put this to rest? This video is from 2012, at the end of Exercise Austere Challenge.
https://archive.defense.gov/news/newsarticle.aspx?id=118239
Link for pic of Israel Anthem:
https://commons.m.wikimedia.org/wiki/File:U.S._Army_Maj._Scott_Hollander,_at_lectern,_the_assistant_chief_of_staff_of_the_10th_Air_and_Missile_Defense_Command,_sings_a_national_anthem_during_the_closing_ceremony_of_Austere_Challenge_2012_at_Hatzor_Israeli_121108-F-QW942-054.jpg
He also sang the German Anthem in 2013 at the St. Barbara’s Day ball. Pic related.