Well, as I posted earlier, for me 2.1 billion people for action of ISIS which has 9 thousand members is senseless. So what, next thing we are going to blame Christians from Armenia, Poland, Italy or Romania for actions of NLFT in India or LRA in Uganda? Because that is exactly the same reasoning - ISIS kills in the name of allah, the NLFT/LRA murders people in terror attacks in the name of "Kingdom of Jesus Christ", and overall they are very similar to ISIS - the only different thing they are christians. Lets not also forget planned parenthood bombings in the USA, Dylan Roof, Anders Breivik, Alexandre Bissonette... So should we ban all Christians from entering India or Africa because a small percentage of them claim their own religion is hateful? Should we ban all Atheists from taking public offices because of Stalin, Red Khmers or North Korea?
How are Muslims from Bosnia or Indonesia responsible for the actions ofa single person from Iraq or Afghanistan? How am I as a Pole responsible for actions of "christians in India"?
To me blaming all Muslims for terrorism is like blaming all Germans for WW2. Except of course, ISIS' power is not supported by any organization.