I don’t think it’s a case of being taken out of context personally… Looking at the full conversation, it doesn’t read that way at all. Just seems like an excuse.
But I wouldn’t consider it proof of racism either- Twitter’s a compressed posting format, conversational, rapidfire, and off the cuff and it’s pretty easy to say something stupid.
Equally, i think it’s possible that in an unguarded moment, using a conversational and informal communication medium, a bit of genuine racism came out.
But I don’t think it’s useful to analyse everything people say and do on the assumption that it’s all come out exactly as was intended and is enormously revealing- let alone in this sort of format.