Okay, interesting. I can see a little better where your conception of "original" racism, as it were, is coming from at least. I've read an all-too-brief history of early Islam catalogued more or less as political conquest, but it didn't always dwell that much on the terminology of classes of people or enemies.
So there was a lot of violence and an exploitative, international as it were, class system. I'm still not sure it's so unique though. Some Arab states have great financial flows from selling oil today, but they are hardly alone in maintaining and expanding that system with huge inequalities. You're sort of making them out to be the ones who bit Eve's Apple there, or no?
And for sheer violence if you prefer... Like, how significant is it who used gunpowder first --- if now everyone almost everyone seems to assume it's just the thing to have? Take another angle: The United States knocked off, what, half a million Japanese (and destroyed much of three cities, housing in particular) over a few months between a single night Tokyo firebombing and the two atomic bombs which also dropped during one day. Has anyone else killed that many noncombatants in the span of one or two days? Many people in other countries would say Americans seem rather racist for their sense of superiority in doing that, hoarding nuclear weapons and/or denying others avenues to hold their own nukes. Many Americans would say they think about these things, but they have other, more pragmatic reasons. Or mixed feelings. How many would be willing to consider, oh, racism. And then if it were considered racism, would you really blame the Arabs or Islam as some amorphous body of faith/ideas, for all that?
Maybe the part that worries me more is where you said, "... and who still practice their racism without shame." Here's why:
It seems to me the racism we have as a society (and which, within the social system, we find often ourselves unable to change to some degree), is well... Sort of just that. By which I mean, it is just the racism we "know." We may like it or dislike it or make charitable gestures about how we'd prefer to change it, but often we're at least implicated in passively living in a place where it is part of the economy. This can variously mean just surviving at the bottom while going through certain motions, or deriving a lot of wealth from it at the top with or without caring, or sitting someplace in the middle wondering why that other group is "so different" (often, so 'uncultured' if not 'barbaric') or gets a particular break this moment. We also don't always know (or sometimes, know "for sure") whether or how much various practices might be objectively measured as racist at all.
I'm skeptical that say, even all Americans (much less the rest of the post/industrialized world if they count) are necessarily always so concerned with the same early Christian line of values when they get involved in all this. Isn't it possible that even racism has much more specific, modern ways of thinking included that aren't so clearly traceable to Islam? Are even all of the significant modern Arab justifications, for that matter, traceable primarily to Islam?
So... How would you say, the Arabs should be seen as 'more shameless' if you will than anyone else? Today, that is.