How should United Israel Appeal respond to their keynote speaker cancelling his appearance?

George Bush canceled his trip to Switzerland in order to avoid arrest and investigation for international crimes a href="http://www.reuters.com/article/2011/02/05/us-bush-torture-idUSTRE7141CU20110205?pageNumber=1" rel="nofollow"http://www.reuters.com/article/2011/02/0…/a where he was scheduled to be the keynote speaker for UIA a href="http://www.kh-uia.org.il/EN/Pages/defaultHome.aspx" rel="nofollow"http://www.kh-uia.org.il/EN/Pages/defaul…/a This could be an embarrment for the charitable institution -- how do you think they should respond?