Rapper Talib Kweli gave his fans an incredibly wrong history lesson Friday, saying that the Berlin Wall was created by Nazi Germany and was proof of how “walls didn’t work for Nazis.”

“So, you’re unaware of the fact that nazi Germany had a wall called the Berlin Wall that was torn down in 1991 in order to foster humanity and diversity? Walls didn’t work for Nazis so why build them here? Build bridges not walls Nazi lover,” Talib Kweli said in response to another social media user.

So, you’re unaware of the fact that nazi Germany had a wall called the Berlin Wall that was torn down in 1991 in order to foster humanity and diversity? Walls didn’t work for Nazis so why build them here? Build bridges not walls Nazi lover. @thefeltyperro @jabbawa78 https://t.co/h3djzlRi4j — Talib Kweli Greene (@TalibKweli) December 21, 2018

Of course, the Berlin Wall was erected not by Nazi Germany, but by socialist East Germany, which was under the occupation of the communist Soviet Union at the time.

Also, unlike President Donald Trump’s proposed wall along the United States-Mexico border, the Berlin Wall was created to stop people from leaving East Germany’s occupation to travel into free West Berlin.

Talib Kweli’s social media posts are not only fact-deficient, they are often hate-filled and vitriolic. In 2016, the “Get By” rapper attacked Breitbart News’ Jerome Hudson, repeatedly disparaging him with the racial slur “coon.”

These are the people who show up when u diss your own @jeromeehudson this is why we call you a coon. https://t.co/sPhVi1MSiP — Talib Kweli Greene (@TalibKweli) July 1, 2016

cc @jeromeehudson stop telling lies about black ppl you coon https://t.co/xkifcZBMFy — Talib Kweli Greene (@TalibKweli) July 1, 2016

Twitter, despite their strict enforcement of rules when it comes to conservatives, took no action despite Kweli repeatedly racially abusing people on the platform over political disagreements.