It's called 'Globalisation'.
It's happening in every other facet of our existence - in industry and commerce we have "British" companies owned, run by, and staffed by foreign-johnnies, so why not football too? And the Chelsea side usually has a fair sprinkling of British players, more than some other Premier League sides, so I don't see it as any sort of problem.
I'm not a Chelsea-fan, but I'm happy for those who are. Well done!