Practically,a false concept in Islam fabricated to give an OK sign for Muslim fanatics to go rape and pillaging other countries during the past,and now to commit terrible acts of terrorism and genocide...even if the victims were fellow Muslims too.
Also note, the word Jihad does not mean to kill infidels as is often said by racist fatherless children ie-bastards, but rather defend Islam against those who wish to destroy it. Islam does not say to conquer the world and enslave or kill all infidels.
radical Translation: kill anyone that is not muslim
educated Translation: War within oneself; struggle to find the true meaning of islam