Palin, Feminism, & Hypocrisy

Justin Taylor has chronicled how Sarah Palin has been called a hypocrite for having her son, Trig, and, almost unbelievably, (and this by a professor of history and religious and the University of Chicago) for her

...pretense that she is a woman.

The conclusion: It seems that some of the liberal bent find homosexuality to be biologically determined but womanhood to be a matter of choice.  Now I'm really confused.