The Trump administration has accused Europe of being an “incubator” for terrorism fuelled by mass migration, in a new counter-terrorism strategy unveiled on Wednesday.

The strategy also focuses on rooting out “violent left-wing extremists” including “radically pro-transgender” groups, as Trump’s conservative administration steps up its political attacks on opponents.

It also further places drug cartels in the Americas at the centre of counter-terrorism efforts.

But some of its strongest language is reserved for Europe , home to numerous US allies who will be alarmed to see their continent in the Trump administration’s crosshairs once again.

“It is clear to all that well-organised hostile groups exploit open borders and related globalist ideals.…