Kanye West’s recent antisemitic ravings have inspired celebration and calls to action among white supremacists, neo-Nazis, and other extremist groups online, according to the Anti-Defamation League. Over the weekend, one group took its support of West and his hateful vitriol to new level, dropping a banner stating “Kanye Is Right About the Jews” over a highway in Los Angeles. After West promised to “go death con 3 on Jewish people” earlier this month, the ADL’s Center on Extremism published a roundup of extremists’ groups response to the artist, legally known as Ye, all of which have delighted in having a...