I am merely offering an observation based on the OP’s comment that the Latvian does seem to really hate the Tunisian.
Having been on the receiving end of racist abuse I have seen how it is completely irrational but does seem to prompt very emotional behaviour. Of course I may be wrong and do indeed hope so but there is a lot of anti muslim sentiment building in Europe on account of the migrant problems associated with mixing liberal European culture with a conservative religious one.