He's never been one to keep his opinions to himself, in particular on social media, but Conor McGregor acknowledged that he went too far recently. 

McGregor will face the German fighter Dennis Siver in Boston on January 28th, and after a media day in the build up to the fight, Mcgregor tweeted out his message to Siver, telling him to "Kiss them feet Nazi"

Pic via Sherdog

While he's a good character and does a lot of talking, this crossed the line and McGreogor took the tweet down pretty quickly having realised that he had caused a lot of offence by calling Siver a Nazi.

He did apologise, but once again in true Conor McGregor fashion, with a tweet that made reference to the previously deleted one.