Following Swedish developments closely as one must, I found this story linking my team Tottenham to an individual example of Swedish bandy extremism.

And is some furtive ethnic cleansing busily under way in Malmo? 

It is always difficult to work out when something is just an idiotic if unpleasant episode of local and no wider significance, and when something is part of a wider, really worrying trend.

Partly because this is just not easy to prove anyway with scientific confidence even when all the facts are clear, as they never are.

And partly because each side of the argument will tend to play up evidence it likes and downplay evidence it does not like.

Not to mention media and politicians making whatever noise suits their immediate purposes.

So is anti-semitism on the rise in Sweden?

If so, is it nonetheless still a marginal and at worst nasty phenomenon?

How would we tell?