Nah, that mentality is dated.

Well, we sort of have that with sexual dimorphism.  Male and female humans have significant differences in physical or mental development.  Stating males on average can lift more than females isn't sexist, it's honest.  Stating biological differences and how certain tasks would favor one or the other can be done without making a grand assertion that one is superior to the other. Especially in a post industrial society where these differences' value has been reduced.

To your example the challenge is that everything humans find distateful every racial group has done, it is part of our species.  Now, if we had a biological cousin that had survived to modern times (which would be impressive given Homo Sapiens track record) my guess in how we treat them would be based off relative intelligence.  For example, we keep Gorillas and Chimpanzees in captivity and afford them no legal rights (ex: property ownership).  The line here is specist which most of us, myself included, are.  If they were capable of speech and abstract thought we could have a grey area that have never had to deal with.  

Another aspect of your idea is if humanity colonized space and thousands of years we somehow evolved to be so distinct that it affected our mental and physical development to become almost alien to one another.  That is hard to say and would be an interesting concept to explore.  If we were to ever meet alien life hard to say what metrics it would use to judge us.

Some interesting hypotheticals to consider Slimebeast.

I'm racist and rightfully so. Nobody likes those dirty toads coming in here taking our jobs. Frog master race for life :)

Great post.

I wish gorillas could speak and reveal that grey area! Although I doubt they would request to own property lol.

I have thought about the alien example a lot. It would be so easy for them to treat us like crap and just use our own argument against us "Look how you treat species who you deem mentally inferior. We'll put you in cages and then we might eat you lol". I wonder how our leaders would argue against that.

This is one reason why I think we need to argue for, or at least explore and relate our arguments to objective morals, not just act as if objective morals exist (which I think most people do) but then have huge holes in your arguments. It's intellectually honest to pretend like the above scenario could never happen.

Anyone who answered "not at all" is lying, we all have in one way or another biases and prejudices, if not then they're not humans!

Using the definition of racist in the OP, then no, I do not consider myself a racist. However, I think the definition of a racist or racism is a lot more broad in today's world, too broad actually. By those standards, yes I am a racist and would argue it is normal. It would be good to go back to the simple definition mentioned in the OP so the racist blanket would not bury half the arguments in other discussions.

I've been informed I'm intra-racist. I think it comes with the culture. They embarrass me sometimes.
Fortunately for me, I do not look like my race... mostly.

Nope, never was. I had my issues with arabs and so on back in the days when I was 2 decades younger. But I also had some issues with a few german people. All I can say is, assholes are everywhere, doesn't matter the race. If you want them to stop bothering you, pick one of them out of the group and beat the shit out of him infront of his friends. They will start to respect you.

I am open minded to everyone and give them a helping hand if they need one.

Everybody is at least a little bit racist

I think I am superior to everyone else, but that has nothing to do with race/ethnicity. ;)