A House Judiciary Committee hearing Tuesday about the rise of white nationalism unleashed a wave of online hate speech, prompting YouTube to turn off chats on livestreams of the hearing.

“Due to the presence of hateful comments, we disabled comments on the livestream of today’s House Judiciary Committee hearing,” YouTube announced on its Twitter account.

Several livestreams of the hearing on YouTube were bombarded with racist and anti-Semitic posts in the platform’s live chat feature just moments after the hearing began. Those chats, which were hosted on the YouTube streams of news services such as PBS and the official stream for the House Judiciary committee, appeared unmoderated for all users.

Hate speech has no place on YouTube. We’ve invested heavily in teams and technology dedicated to removing hateful comments / videos. Due to the presence of hateful comments, we disabled comments on the livestream of today’s House Judiciary Committee hearing. — YouTubeInsider (@YouTubeInsider) April 9, 2019

Even though YouTube said the comments feature for the videos was eventually disabled, comments and chat features on other YouTube streams remained live through the morning. Those transcripts were riddled with racist and anti-Semitic abuse.

The hearing featured a panel of witnesses from civil rights organizations who testified on the rise of white nationalism and race-related violence, as well as the role technology platforms have played in the spread of hate speech.

Eileen Hershenov, senior vice president of policy at the Anti-Defamation League, pointed to fringe internet platforms 8chan and Gab as playing a central role in the rise of white nationalism.

“These platforms are like round-the-clock digital white supremacist rallies,” she said.

While much of the testimony focused on statistics around anti-Semitism and anti-black violence, the early portion of the hearing was also highly politicized, with some witnesses pushing back on the assertion that white nationalism was a problem on the far right, arguing instead that the far left was fueling the hateful rhetoric. Others called on President Donald Trump to more forcefully condemn white nationalism.

In early testimony, no lawmakers suggested new laws or regulations to crack down on the rise of hate speech on the internet.

Facebook and Google, which owns YouTube, sent officials to the hearing who reiterated the efforts of their companies to address hate speech.

“We take these issues seriously and want to be part of the solution. We understand that tough policies must be coupled with tough enforcement,” Alexandria Walden, Google’s global policy lead on human rights and free expression, told the lawmakers.

Some far-right YouTube channels raised money off of the hearing. Red Ice, a channel “focusing on issues concerning European survival,” hosted the stream on YouTube under the title “House Judiciary committee Hearing on Criminalizing Nationalism for White People.” Some users donated to the channel through YouTube’s donation system, one adding a white nationalist slogan along with their contribution.

The hearing comes as the role of technology companies in the hosting and spread of hate speech has come under renewed scrutiny after a gunman killed 50 people at two mosques in New Zealand last month. The gunman livestreamed the killings to Facebook, and the video then circulated on the social network and other social media platforms. The gunman also said he had been radicalized online.

Facebook later changed its policies and banned white nationalism, which had previously been permitted on its service.

While the companies rushed to remove the video, the event galvanized international criticism of tech companies for not doing enough to crack down on hate speech. Outside the United States, politicians from the United Kingdom and Canada have openly criticized big tech companies and said they are considering laws that would hold the platforms accountable for the spread of harmful content. Australia recently passed laws that include possible jail time for executives of social media companies if violent content is not removed quickly.

Social media companies grew quickly in the late 2000s and early 2010s under the principle that they were not responsible for the content posted to their platforms. Companies including Facebook, Twitter and Google-owned YouTube tried to remove some content, such as child pornography and extreme violence, but allowed the vast bulk of their users to operate with few limitations.

That began to change in the mid 2010s when the use of social media by the Islamic State group to spread militant propaganda and recruit people came under scrutiny. Tech companies have since claimed that they are able to find, identify and remove most content from Islamist extremists — leading to calls for similar action to be taken against white nationalists.