You're not wrong. It's pretty obvious what's going on, and you should definitely be concerned. Fortunately, it's mostly the older people - who have lived through the Cold War. Their paranoia is resurfacing.

A vast number of younger people completely realise how hate can only lead to war. Hence, you also see many protests for peace. The UK may have voted for Brexit, but you also see millions of people - especially under 35 - march in support of Jeremy Corbyn and against Trident etc. In fact, if you look at Brexit stats, the young people voted 70% or more against. It's the older people who swung the vote.