Someone early on this thread said something about racist and nationalistic comments being the result of lazy thinking and I agree.
I have one excellent English employee (OK, I think he has a paternal Italian great grandparent going by his surname! But then I've a grandparent born in Wales; oh the shame!

)
In a previous life I have employed or been in business with a Polish lady, a Black Englishman, two Welshmen and several Englishmen and women.
I have three East European tenants who pay on the nail and who (at point of checking last April) have "proper jobs" (tax insurance etc) as warehouse operatives/clerks in Avonmouth. The house is kept spotless.
The only two employees I have ever sacked for misconduct (theft) and (fraud) were white english but I think that statistically having over the years employed about twenty different people the vast majority of whom were white English then that was just the way the numbers fell.
I know it is boring but as always I say each person should be judged on his/her own merits - not their country of birth or their race.