Not everyone gets it right all of the time.
She should have been more worried about multiculturalism and Islamasists invading her country.
From a geopolitical perspective, England will always be concerned about a United Germany.
Bingo. The Germans along with the Poles, Austrians, some northern Italians and others stopped Islam at the gates of Vienna in 1683 AD.
The Austrians, Germans and Poles did most of the heavy lifting then. British did nothing.