In the 30's Germany elected the wee bloke with a funny tache and a dodgy haircut as chancellor. Their philosophy and edicts began to trancend Germany and in 1938 they forced the Cezchs ceded the Suddetenland creating a small influx of refugees to other states, later that year the anschluss with Austria started the mass migrations of the Jews and other non aryan fgroups in to the rest of Europe and other countries. What did we do? We appeased them, we let them go unchecked which in the end led to WW2.
At the end of the cold war Yugoslavia imploded creating a limited refugee issue with Muslim Bosniaks, orthodox Serbs and Catholic Croats generating various stages of ethnic cleansing within their own nations. This was yet another religious conflict with created mass exoduses from historic homelands, again we appeased until it became too late to prevent the conflict that ensued.
Guess what; The western world and Europe in particular is appeasing the Middle east yet again, Shengen means we can't prevent the infux of refugees from the region coming in through southern Europe and moving north.
I don't know what the solution is, I'm not certain all out military intervention is the answer but the west must do something before it's too late. I'm not as blood thirsty as perhaps TTT's OP suggests we should be but something has to be done and done soon.
Personally, I don't mind what colour you are, what creed, nationality or religion someone is but if you come to our country please adapt, please understand what our laws and customs are and respect them.