This guy was born in Britain, his parents were refugees. This alone does not make him a terrorist otherwise we have lost already. Thankfully there are millions of people who were born here of migrant parents or are second/third generation and are still not terrorists.
We have to accept that it is only some born here who choose , yes choose, this path to "eternal happiness" Look at those who joined ISIS some are white middle class and they became radicalised by the fundamental doctrines of extremists. Please note I did not say extremist islamists as this is not usually the case, it is extremists who purport to follow the doctrine of Islam but make it up as they go along. Again as I said above there are millions who follow Islam who do not believe all the nonsense espoused by ISIS but they and their religion get the blame.
I myself am not religious , I do believe it leads to division and strife however in the case of ISIS religion is being used as a cause for people who are fundamental nutters, if Islam did not exist then they would find something else to follow to exercise their lust for violence. To me it's a bit like the IRA in the 70s, some of them were true followers of that cause but a lot were simply criminals using it for gain and hatred against others.
I am not preaching or apologising for any particular religious groups in this blurb, this is just me putting my thoughts down on paper. I think it is just too simplistic to blame it all on Islamic refugees and migrant as there is only a small sub group within them who choose that path. Look to the individuals , they are flawed people looking for a cause to follow.