I have said nothing of the left promoting the well-being of minorities, and I have said nothing of why minorities support the left. I have said that the left tries to place left-leaning demographics in positions of power and influence (which is not always the same thing as actually helping those demographics, although helping them may be a side effect), and that leftists try to populate their social circles with those same demographics. Obviously, the right tries to place right-leaning demographics in positions of power and influence as well. For that matter, anyone who identifies with faction X tries to place likely X-ists in positions of power and influence. However, an attempt to do such a thing rarely feels like a power grab from the inside, regardless of your political orientation. Inside the mind of a leftist, a power grab of this form feels like promoting the noble cause of diversity.

in what way are those theories exclusive of each other?