At the bottom of that article: “[Dick wrote that he was] approached in 1972 by a representative of a neo-Nazi organisation who pressured Dick into placing coded messages involving ‘politics, illegal weapons, etc’ into his future novels. He linked this organisation to a series of robberies which happened at his home in California”. Wow.
He was convinced, in paranoid-Dickian-realityisweird fashion that Lem was actually a committee of people, and a Soviet hoax, not an individual.
0: https://culture.pl/en/article/philip-k-dick-stanislaw-lem-is...