With the US tech industry scrambling to contain the fallout of Donald Trump’s latest assault against immigrants, Europe senses blood in the water. Trump blindsided American businesses late last week with a new $100,000-a-year fee on all H-1B visas, which are used to bring tens of thousands of skilled workers to the country’s tech sector. Giants like Amazon, Google, and Microsoft spent the weekend rushing existing H-1B visa holders back from abroad and urging them to cancel future travel…