A wound has to be cleaned before it can heal.
All the folks - particularly in the security establishment - that can't stop talking about the threat from Islamofascists or Sharia law - this is their fault. Hatemongering, bigoted leaders like LePen and Trump, this is their fault. 
And especially all the safe, comfortable white folks like me, who are secretly scared of different looking/sounding/dressing/smelling others, when reality dictates that they should be afraid of us. 
Far-right terrorism is terrorism. It attacks our institutions and the fabric of our community. We give in to that terrorism when we tolerate extremist hate speech. It doesn't always turn into murder, but it always precedes it.