Stephan Balliet, 28, sentenced to life in German prison over synagogue attack
Balliet shot dead two people on the street after trying and failing to break into synagogue in Halle during the holiday of Yom Kippur to carry out a massacre
He admitted trying to attack synagogue during trial, calling Jews 'my enemies'
Balliet apologised for killing one passer-by, because 'I didn't want to kill whites'