There is no surge in anti-semitic crimes.
What has happened is that a Jewish quasi Police force has been set up called the Community Security Trust (CST). The CST have been patrolling Jewish areas and encouraging complaints. Any comment that criticises Israel is recorded as an Anti-Semitic crime. So if anyone says Israel is treating the Palestinians badly, they are recorded as being anti-Semitic.
The CST have also infultrated the police. They have insisted on meetings with the police, who then agree to hearing the CST's reports. That often results in extra police being assigned to Jewish areas. When this was done in Manchester, instead of reducing Anti-Semiticism, there was a 300% increase. The increase was not genuine, it was zealous cateloguing of every they perceived as anti-Semitic.
http://www.thecst.org.uk