I guess that while Trump hates California, and arranges federal decisions to screw Californians when possible, they count as Americans when compared to foreigners, so it's appropriate to steal/bully/screw those foreigners even for Californian benefit. Not that this surprises me - it fits the usual belief pattern and behaviour of the us-vs-them crowd - both screwing (some of) their own, and defending them aggressively against those even farther outside the charmed circle.