Having clicked through to the link you posted, it looks like what happened is that she made a tumblr post claiming to be sincerely upset about mistreatment of immigrants, contrary to what she described as conservative assumptions that people are simply pretending to care in order to score points against Trump. The poster you linked ran a search for the terms "immigrant" and "borders" on Vox, did not find any articles from her (they seemed to be interested in specifically criticism of Biden, but there were no articles about Trump either), and decided this was proof that liberals were indeed, pretending to care in order to score points against Trump. The fact that you treat this as evidence against Kelsey's character makes me think less of you, not her.