Calling what is happening "genocide" is overstating the issue, and is not accurate. There is more intermarriage, more brown and black people are participating more freely in society in general and politics specifically.
Light skinned people and whites have been killing off and oppressing brown and black people all over the world since the beginning of time, so the fact that those of us who are White NOW complain that it might be happening to us (even though it is not) seems a little ridiculous.
At the same time, when you look at social dominance theory and social dominance orientation, it helps to explain the white male panic that is seems to be currently going around.