(I apologize if I offend anyone here. What I am about to say does not reflect my views of anyone or any race, ethnicity, etc. I love you all.) What about Al-Qaeda?
Not worth a damn. That's me saying that because they have no actual formal training beyond playing on some monkey bars.
Israeli special forces are aloud to have beards and they are considered the best in the world. Even US military members will attest to how intense these people are.