If two wrong things do not make either right, tell me then?

how can anyone on this planet - religion and politics aside - possibly justify a well doented policy that calls for action to be taken against anyone choosing not to comply (and one action is not merely brutal, but mandated!) to a policy which occurred in 1096? 1096!! Bear in mind also, Alexis Comneus felt pilgrims were being attacked on their way to worship! And it was Pope Urban II that began the crusades. This is now the 21st century we live in ppl! Where, and more importantly, when, does common sense enter our thoughts and minds? Have we not learned anything?