Left does not mean liberal. It means left... leftists... to include anyone who is one the left wing of the government spectrum. To include liberals, socialists, democrats, progressives and some independents.
Yes... they are. Look it up. You can find a list of klan members that are or have been in government positions. Roughly 70% of them are democrats.
Again I said DEMOCRATS - to include those ideologies.
If they call themselves Christians, then yes, I would call them Christian terrorists, or Islamic, or Buddhist if they call themselves that.