“To generalize is to be an idiot.”

Conan http://www.thatvideosite.com/v/94 (2006)

Variants:
I fear the day when the technology overlaps with our humanity. The world will only have a generation of idiots.
I fear the day when technology overlaps our humanity. It will be then that the world will have permanent ensuing generations of idiots.
1995 film Powder includes a similar quotation attributed to Einstein:
It’s become appallingly clear that our technology has surpassed our humanity.
Although it is a popular quote on the internet, there is no substantial evidence that Einstein actually said that. It does not appear in "The Ultimate Quotable Einstein" from Princeton University Press nor in any reliable source. " Quote Investigator http://quoteinvestigator.com/2013/03/19/tech-surpass/" concluded that it probably emerged as a meme on the internet as late as 2012.
Misattributed

Our Federal Union (1975), p. 248
General sources

Source: Academy Series - Priscilla "Hutch" Hutchins, Odyssey (2006), Chapter 7 (p. 59)

Was written in a slightly different way by Leo Longanesi in Italian, above form has been attributed to Kafka without evidence.
Misattributed
Source: One Idiot Is One Idiot. Two Idiots Are Two Idiots. Ten Thousand Idiots Are a Political Party, Quote Investigator, 2021-10-08 https://quoteinvestigator.com/2021/10/08/idiots/,

Source: The Demigod Diaries

Em geral, nós outros, os Portugueses, só começamos a ser idiotas – quando chegamos à idade da razão. Em pequenos temos todos uma pontinha de génio.
"A Literatura de Natal"; "Christmas Literature" p. 42.
Cartas de Inglaterra (1879–82)

Source: Looking for Alibrandi