Ok, since you like the dictionary game, let's have it.

First, there's no "muslim race". A race is due to a visual racial characteristic making a person different by virtue of aspect. Even within the muslim community there are extremely strong ethnic (not racial) repulsions, such as between berbers and arabs, and between iranians and arabs. They hate each other.

If we go on to analyze what you just posted,

"The belief that all members of each race possess characteristics or abilities specific to that race"

Let's define race as the mostly known "white/black" racial distinction. A racist statement would be "all blacks are extremely good dancers". Another would be "all blacks are criminals". These are racial (and racist) statements, according to the above definition. Note that everyone gets uppity for the second one, but not a lot of people would at the first one. "all blacks have huge dicks" will certainly be a racist statement no black will be offended from. Yet, they are racists according to the definition. Note that those statements generally imply a behavior as correlated with an aspect, which may hold, but this correlation is not causal. Racism is to assume without any effective data to sustain this, that there's a causal correlation between the color of the skin and the criminality. There may be another factor, poverty, in place. If a real, scientifically demonstrated correlation were found, oh well, that would be a problem, but it would still be a fact regardless how you don't like it. The hope is that a sensible education strategy would be set in place to mitigate an innate tendency, putting more attention on potentially troublesome individuals, due to genetic markup, regardless if this genetic markup has a visually recognizable component or not.

"esp. so as to distinguish it as... Prejudice or discrimination directed against someone of a different race based on such a belief."

Prejudice or discrimination, ok. Prejudice is not necessarily negative. A prejudice is an opinion you may have without any data concerning the individual person. Definition:

*Prejudice (or foredeeming) is making a judgment or assumption about someone or something before having enough knowledge to be able to do so with guaranteed accuracy *

Discrimination is certainly negative. Note that in my statement I haven't said nor prejudice (I had actual data on some elements of the set, that is, actual people claiming muslim faith) nor discrimination (did I say they should go on the back of the bus?).

That definition defines exactly everything you're saying.

And here comes the second part. As I said, there's no muslim race. There's a muslim religion. This religion teaches explicitly some behaviors that apparently are, from my experience with my dataset, intrinsic in the religion and/or zeitgeit of the muslim population, having found them consistently across muslims coming from completely different parts of the world. I am therefore more tempted to say that they are part of the common cultural lore which, according to the mechanism of strong ties between state/religion/culture which is typical of muslim countries, permeates the average population. I find these behaviors inappropriate, aggressive and impolite, like I find the behavior of an American going around with his SUV and a gun in the drawer as inappropriate. I don't necessarily assume that a random American I meet around has a SUV and shits on the kyoto protocol, but I know that culturally, there's a probability that this may be verified, although I also consider bias of sources that may drift these expectations at a higher rate than it actually is.