What they're talking about is instinctive preference for other creatures which the baby identifies with, and in the research the article cites there isn't any direct correlation to race. They talk about food preference — something superficial. There was no research cited to indicate whether the behavior extends to racial distinction, so your using this research to back up your claim that "babies of about the same age as the ones shown in Obama's tweet already display instinctive xenophobia" is intellectually dishonest at best.
And I ignored the Independent article because they're known to be poor at in-depth reporting.
https://www.utoronto.ca/news/racial-bias-may-begin-babies-si...
Independent.co.uk link discusses proposed evolutionary/biological origins of xenophobia, and specifically points at groupthink, not individual bias, as a possible explanation.
Smithsonian link describes a study where babies show a preference for non-racialized puppets who displayed similar food preferences. Nothing to do with race or bigotry.
https://www.utoronto.ca/news/racial-bias-may-begin-babies-si...
Far from babies being born racist.
No one is saying you can't convince babies, or anyone, not to be racist. Actually, if history proves anything, it's that you can convince anyone of anything if you get to them early enough.
I prefer to think of it this way: The ability to rise above this type of thing is a part of what makes us human. Learning to not be bigot is something you have to do. You have to work at it always, it's not free.
The point is just that the statement is literally false. That doesn't mean it can't be poetically true.
Once friendships occur, specifically, it tends to fade away pretty quickly.
So I'm not sure if baby-sourced studies like the one you show "prove" that "it's not true."
Not saying that the studies are wrong; just that we all have many biological traits that we overcome easily through nurture.
EDITED for typos and clarity.
Why would something being untrue make it popular?
The evolutionary basis of xenophobia is well-understood. A quick search turns up, for example:
http://www.independent.co.uk/life-style/health-and-families/...
Babies of about the same age as the ones shown in Obama's tweet already display instinctive xenophobia:
http://www.smithsonianmag.com/science-nature/are-babies-bigo...