Michael Kadar, 19, began making hoax threats when he was still a minor and claimed it was “like a game” for him.
After intense backlash against the “Polish death camps” law, Warsaw is watering it down to remove criminal punishment.
A recent coordinated attack on a Roma community left one man dead, and Jewish monuments have been defaced across the country.
The hotel defended its signs requiring only Jews to shower before using the pool facilities.
Pew's survey of the ethnically and religiously diverse region showed many would not welcome minority groups as citizens, neighbors or family.
Khan said the Labour party’s failure to tackle anti-Jewish sentiment was “unacceptable."