Yes their are many weak spots in border of Schengen zone.Problem is they go through Turkey,Greece, Macedonia,Bosnia, Serbia and Croatia so from my point of view those countrys dont want refugees in their country and same goes from refugees they dont want to stay in this coutrys because its lower standard and low social benefits so its in both interests to get those refugees as fast as they can out of their countrys so lot of illegals come in... i think that everyone shoud make stronger border controls starting from Greece and Turkey just stop the problem at the start dont let any illigal immigration and we wont have problem with terrorism because we most be honest their is a lot of radical exstreme islmaists that need to be stop
The sad thing is that the honest refugees themselves aren't usually the problem. Refugees are people running away from some danger in their country. They need to be helped. The problem is that sometimes terrorists come under the guise of refugees. I think it must be very difficult to be sure that the people immigrating to your country are real refugees. Do you think all European countries should just stop helping refugees? Who can help them?