This is an excellent rebuttal piece.
Unfortunately, she makes two assumptions:
1. Minorities are liberals by definition.
2. Conservative = Republican.
Numero Uno -- Now, plenty of minorities are Democrats. Currently, most. But huge swaths of the Hispanic and Black communities are socially very conservative when it comes to family-values questions. It's still a debatable point, but that's a caveat that needs pointing out.
Numbah Two -- by trying to cast matters as Dem-vs-Rep, she misses something important. Yes, better research is required. But the phenomenon itself is fairly widely noted. If you take a poll of people who identify as strongly liberal, and a similar poll of those identifying as strongly conservative... chances are, it's the latter with the kids.