Only this video is a WHITEWASH created by mostly Ang Mohs who could not handle the bloody brutally they fucking suffered from Muslim Militants, seeking false sense of security and assurance, via SELF-DECEPTION.
Small knife surely can cut necks, effortlessly.
You have seen how carcasses of cow lamb and pork being cut in market. When they are not frozen nor smoked salted ham, they are so soft and easy to cut. Only just a bit stronger than butter. Live body is even softer than that, because it is warm.
You can not do it does not mean that the militants can not do it. It is impossible to you, but just very easy to them.