I'm not particularly worried about terrorist attacks. You are right, the incidents are low, but nevertheless, they are an added risk.
What I am worried about, and I think most people are, is the slow, hidden (and sometimes not so hidden) ersosion of western values and our culture over time by a doctrine that has absolutely no connection to the way of life our forebears created. You don't have to travel far to see this in practice. In some parts of westrn europe I have seen with my own eyes the total transformation of areas into 'a country within a country'. It isn't pretty.
