Race doesn't exist. So, it is stupid to get up in arms over something that doesn't exist, (although that can easily be applied to other subjects as well.)
That said, there is nothing wrong with dating someone of a different ethnicity from you, just as long as you don't go off thinking that one ethnicity is superior or inferior to the next.
There are good people in all colors just as there are bad.
I've had White guys approach me telling me that they like caramel, and make a point of telling me how they exclusively date outside of their race, in the same way I've had Black guys with self-hating issues tell me how pretty I am and how pretty our kids would be because of my skin color, while dissing Black women by saying how ugly and ghetto they are, and then have the nerve to ask me what I am in the same breath. These men do so, even though their mothers, sisters, grandmothers, aunts, baby mamas and daughters are all Black women.
The thing that bothers me is when you have people that try to force a person into identifying themselves into one category or another.
For example, if a Black and a White person have a kid, then that kid is black, no matter what, because of the One Drop Rule. And if that kid decides to acknowledge both, then, they are likely to be thought of as Black by Whites, and trying to be White and ashamed of being Black, by Blacks.
But if a White and an Asian person have a kid, then the kid is both White and Asian. If that kid wants to acknowledge both, then there usually isn't a problem.
Personally, I am an ethnic mess. Although I identify myself as Black, mainly because of the way society treats me (I've been called a n*gger c*nt by my ex's racist family, and whenever I go into a store, they follow me around like I am going to steal something, when in all truth, I make almost triple their hourly pay, and White people either tell me that they didn't know that "Black people came in that color" or that "I have an honest face" or they'll call me a n*gger if they're racist..) I am actually multi-ethnic.
My mom's side of the family is part Irish, Native American, Trinidadian and Black, my mom actually looked up our ancestry, and found relatives in the UK as well. My dad's side of the family is Irish, Native American and Black. My grandfather had White skin and straight hair, even though he was half Irish and half Cherokee and because he would've been arrested for being with my grandmother, who was Black with Blackfoot and Apache roots and has, he started telling the racist cops and people that he was an albino, figuring that if they were stupid enough to be racist, then they'd be stupid enough to believe that.
My dad, has traits from both his parents, as do my brother and I, and yet, because people still stupidly believe in the ODR, they try to force us unto one group or another.
I refuse to do it, although, admittedly, I just check the Black box because I can't be bothered to write an explanation next to "other" especially when my place of birth is Germany on the same form, and they want to have a conversation about that too, or I'll just sarcastically say "human." Other than that, I don't go out of my way celebrating any of my heterogeneous background. I don't celebrate Kwanzaa, and I don't celebrate St. Patrick's Day either, although, if I have a taste for it, then I will get a Shamrock shake. It's less of a headache that way..