Chechnyans terrorists also are Russian citizens.
You can’t have it one way and not the other.
Bad example. Beslan thugs were international gang from all over the neighborhood.
At the very least one of them Abu Al Farokh was a Jeddah-born Saudi national on student visa. Another four unidentified terrorists were obviously Arabs too and probably Saudis although undocumented and not in FMS database. Probably sneaked into Russia from Georgia.