There is no problem with Spaniards in France or Poles in England, not even with Hindu/sikh/Christian Indians in the UK or Sri Lankan buddhists/christians in France
the problem is Islam...
Islam is the largest part of the problem, but there actually are problems with all immigrants who come from different, non-Western cultures as well as blacks who come from the Caribbean and Africa--Christian or otherwise.
I have lived in five European countries for a period of 13 years. There is far more prejudice than in the US. The UK cannot be held up as an example of great tolerance, including even for Poles who went there to work.