This isn't true, and it hasn't been true in a long time. I've been involved in the homeschool community in Colorado for a decade, and we are, as far as I can tell, representative of the larger population with regard to religion, politics, and lifestyle, and even race to a good extent. In terms of politics, I'd actually say most of us skew liberal. The past few years we've seen an influx of queer kids, who are either obviously not gender- or sexually conformant, or questioning along those lines. Turns out, homeschool communities can offer an ideal refuge for queer kids, compared to the sheer unrelenting brutality of conventional school.

Depends on the particular community of course, but ours is good for that.