If you look at recent history, the tragic consequences of the British opposition to the creation of the state of Israel and to Jewish immigration in Palestine in the 1930s should not be underestimated : if the state of Israel had been created just ten years before 1948, there would have been no Shoah. But, while the Nazis came to power and began to carry out their agenda toward Jews, the British closed the doors of the land of Israel that they occupied to European Jews who needed to flee. These bastards even fired on Shoah survivors who had lost everything and who were desperate to reach Israel after WWII !
Today, the British are probably the most anti-Israel and pro-Arab people in Europe - although the other European countries are very bad too, and they are probably the biggest dhimmis too - a lot of them love Islam.
However, in terms of hatred and persecution of European Jews living inside their borders, the Germans, the Ukrainians, the Russians, the Poles, the Romanians and the Spanish have been far worse than the British on a historical perspective. For the last two centuries, Jews have been free and safe in Britain, at least until the development of radical Islam on Britain's soil.