The murders referenced reach as far back as 2006.
In it, a Muslim youth attacks a non-Jew who was wearing a yarmulke as an experiment - Just looking like a Jew gets you assaulted in 2018 Germany
Swedish Reporter Assaulted After Wearing Kippah to Test Attitudes Toward Jews
Reporter walked through southern city of Malmo wearing traditional Jewish cap, had to flee for fear of serious violence. haaretz.com/jewish/kippah-…
Jews in Denmark have just been warned by Israeli officials not to appear publicly wearing Jewish religious symbols such as yarmulkes or stars of David in order to avoid increasing anti-Israel and anti-Semitic altercations.
Norway's Jewish Community has advised its members against speaking Hebrew loudly on the streets or wearing Jewish emblems.