Do you agree with Liberals that mixed-race children are better than their single-race counterparts?

EmperorOfRussia
I had a discussion with two Liberals here and they had made such claims. The first one, a 35 yo Liberal man, claimed that "biracial children are better" -- clearly implying a relation of superiority toward other children -- just after denying the concept of race. Such doublethinking...
Liberal doublethinking
Liberal doublethinking
The other, a Liberal girl who is anything but smart, has suggested that being attracted to a person of your own race is something like incestuous and would lead to inbreeding, which is a so retarded idea and unscientific that only a SJW cultist could give credit to.
The Liberal Flat Race Theory
The Liberal Flat Race Theory
I won't judge and I'm open to discuss this subject. In order to understand Liberal ideas, I have some questions:

1. Can you Libs show me any scientific evidence that mixed-race children are better than single-race children? Statistics about life expectancy, quality of life, IQ and social adjustment would be highly appreciated. You must start looking for stats of countries like Venezuela, Brazil and the diverse areas of the USA.

2. Do you Liberals really deny the concept of race? If race doesn't exist, how could you claim that biracial children are "better"?

3. I'm a White-European, as you'd say. How am I incestous and "inbreeder" for being married to a White-European woman who was born and raised more than 1000 kilometers away from the place I came from and for being the father of her child?

#MixedRace
Do you agree with Liberals that mixed-race children are better than their single-race counterparts?
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