Exactly.

If a person has taken up arms against the government the charge in a
criminal court is treason. Once you have proved your charge in open
court you can subject a person to the penalties perscribed by law.

Take a logical step here.
All persons involved in the 9/11 attacks were Saudi citizens. So why
are any Suadi nationals allowed any access to the US and why did the US
government put troops into Suadi Arabia to defeat the terrorist
organizations and promote a democratic society. ?

Try which King is good friends with a US president and his oil buddies.