" not even a country as welcoming to muslim immigrants as Spain is immune to Islamic terrorism" LOL .    

Only a tiny number of Muslims want to commit terrorism themselves but there is a much larger minority that morally support terror and the call for jihad against non believers. The fact of the matter is that if you are going to import millions of Muslims into the West and you are going to meddle in the affairs of the Muslim world then you are going to get some Islamic terrorism. The policy of the West is Invade and Invite. Terror should almost be expected. We were not bringing in millions of Germans during WW2 while we were bombing Germany.