If he actually felt strongly about wanting to call our racism in society he would have done exactly that. But his two tweets would suggest he was a victim of racism very often and really doesn’t appear (in my opinion) that he would have tweeted that if he was still a Ticat.
Multiple tweets since he left would suggest he’s still a bit bitter with how it ended.
And as Bobo said, he had multiple opportunities to leave Hamilton over his 8 year career and never really appeared he was close to.