I have no idea what happened. But actually I think Seven makes a great point. I think if you insulted muslims, even after a few beers or out of frustration or whatnots, that doesnt exactly make you a racist per se or whatever - but it does show that the sentiment is there, however vague.
And to me, that's okay. I think it's naive if people think we're all not racists and deny that sentiments like these exist. After all the history and wars and on goings in this world how can you NOT feel anything? It's just a matter of control and rationalizing with yourself and respecting one another on a day to day basis, like you with your Muslim friend, and you've never insulted Muslims on this forum and respect their POVs as far as I know. So yea you slipped up but you say sorry, which is great and all's forgiven.
I'm saying this, because though this is shameful and wrong it's the truth, (and it's a common practice in Malaysia) - we have 3 main races in the country, and though we are interracial and mix really well at an individual basis .. the bigger picture is not so rosy. There's a generalization that the chinese malaysians are irritatingly competitive and rude, so when I drive, likewise with other people, and some chinese guy cuts me off and we get pissed and we'll start saying something like "fucking chinese!" etc. Does that make me a racist? In a way, yes. But do I respect them any less or treat them differently? No, in fact my best friends are Chinese. But there's that sentiment there somewhere.