Since I am a former Marine let me address the point to my brothers. You did your time in harms way and you need to go on with your life. Many Marines like myself chose to become Police Officers. The last thing you need in your career is to find out that an alleged Veteran group you embraced was a subversive arm of the jihad or some crazy splinter group. You can swear you had no idea but it's too late when you go up for a Lieutenant rank. Think about it and do the right thing.