I agree immigration controls should be tighter. I agree vetting procedures should be more stringent depending on age. I of course think the criminal and terrorist acts carried out are abhorrent and the perpetrators scum. However I don't think a blanket 'whites only' policy would resolve this countries issues. People of colour have been coming here for decades, sometimes at the request of our government, and positively contributing to our society whilst integrating as best they can. Do all of them try their best to integrate? Nope. Just as not all UK citizens will try to integrate when they go to live in a different country.Yes, if that's what it takes to reduce/stop threats to our society and above all threats to our security. Many of the terrorist attacks in Europe have been from recently arrived migrants claiming to be refugees. It's too risky to let them in because it's impossible to tell the harmless ones from the dangerous ones. But we're going to be invaded by undesirable cultures anyway - our traitor politicians who talk tough on immigration, but do the opposite will see to that.
The truth is, Poles, Estonians, Ukranians, etc will fit right into our society and be useful productive members. Other cultures are both largely unable and unwilling to adapt or assimilate and will always be a problem for the host population.
Also, whilst terrorist acts are of course abhorrent, I think it's a little naïve to think people from eastern Europe that live here don't commit crime, some of it serious and including organised crime. Or is that more acceptable because they're white?