Yes because I would not expect HN populace to be the same distribution as the general US. Just like how I would find it strange if medical professionals had more anti-vaxx than I expected.
Right-leaning is giving them too much credit. It's just self-leaning and, like many other political groups, Trump just said the transparently false stuff that he needed to in order to appeal to them.
The dumbest and/or most self-interested of many demographics, it turns out, were happy to be tricked!