The former members of Pink Floyd have had a long-running and highly public feud ever since Roger Waters, the principal writer of the band’s best-known material, left the group in 1984. His former chief collaborator, lead guitarist David Gilmour, carried on using the band’s name, leading to bitter legal battles. Aside from a couple momentary reunions, the two showed no interest in burying the hatchet, let alone working together again.

Recently the feud exploded, going well beyond the confines of the band and bleeding into issues of geopolitics, war, and peace. On February 6, Gilmour’s wife, writer Polly Samson, tweeted, “Sadly @rogerwaters you are antisemitic to your rotten core. Also a Putin apologist and a lying, thieving, hypocritical, tax-avoiding, lip-synching, misogynistic, sick-with-envy, megalomaniac. Enough of your nonsense.” Shortly after, Gilmour concurred, tweeting, “Every word demonstrably true.”

Samson’s tweet was a shocking, vitriolic series of epithets that paint Waters as a complete and total scumbag. This is no mere difference of opinion. Plenty of people disagree with Waters, but Samson apparently sees him as an irredeemable, worthless human being who contributes nothing but evil to the world.