YouTube is one of many companies that has given its logo a rainbow-themed makeover to show support for LGBT rights – but, underneath the colourful veneer, a row has erupted over how the video-sharing site enforces its own hate-speech policies. At the centre of the dispute is journalist Carlos Maza, who presents a popular series called Strikethrough for the news site Vox. He says he has faced persistent abuse from rival video-maker Steven Crowder, who has more than 3.8 million subscribers on YouTube. Whenever Maza publishes a video for Vox, Crowder will post his own “debunking” video, peppered with insulting language attacking Maza’s sexual orientation and ethnicity. So, last week, Maza posted a video compilation of the abuse. In the clips, Crowder imitates Maza’s accent and calls him, among other things, a “lispy queer”, a “gay Vox sprite” and a “gay Mexican”.