The following is summarized from an Express UK article:
A study by the polling group Ipsos Mori shows that the French hold more anti-immigration feelings than their neighboring countries, with only 11 percent thinking immigration had a positive impact on their country, compared to 18 percent in Germany and 20 percent in Spain.
Also, 38 percent thought closing the borders would be a good idea, and 67 percent thought that terrorists are waiting in the country disguised as migrants.
The study took place between June 24 and July 8, weeks before the terrorist attacks in Nice and Saint-Etienne-du-Rouvray.