I don't think the threat to Europe is going to be from refugees coming in from Iraq or Syria. If ISIS manages to blow something up in the UK it will be a British or another EU national who will be carrying out these activities. I would assume that any refugee coming in the country would have some tight surveillance on them. What ISIS wants is division because that works in their favour. The more division the easier it is to convince people that there is a big difference between us and them. The more hate crime the more the propaganda will work. So what we can do is show how ridicilous ISIS and other radical groups are. A school program will have to be included in school to teach muslims and non-muslims how groups like ISIS are at crossroads with Islamic teachings. The majority of people killed by ISIS are muslim and they are burning muslim town after town in Syria. Also programs outside school are needed to educate muslims and non-muslims about Islam and to clarify certain scriptures that are causing confusing. Such programs have already started but of course we need to see more. Muslims have been a lot more active in explaining to others about Islam after recent events. So yes education is key.