The post was tongue in cheek; I don't actually think it's racist. I like being catcalled and I don't think it's racist to acknowledge black men do more catcalling. I'm personally into it.
There is zero indication of sarcasm or humor in your post, though. Your medium of expression is not one that effectively communicates “sarcastic racism”.
Several people thought it was satire when I first posted it, so i thought the tone was ok. Plus I was tweeting for what I thought was my twitter followers, who are very aware that I don't actually think like that.