OTL, 19 hijackers were responsible for stealing the airliners and flying them in the September 11, 2001 attacks on New York and Washington. Fifteen of the hijackers were from Saudi Arabia, two were from United Arab Emirates, one was Egyptian and one was Lebanese.
1) What would be the cultural and diplomatic fallout if the hijackers included amongst their number one or more Muslims from western countries (France, Germany, UK, etc.)? Would a hijacker being an immigrants vs. native-born make a difference in terms of cultural and diplomatic ramifications?
2) What would be the cultural and diplomatic fallout if Russian Chechens were amongst the hijackers?