Previous Reddit CEO's have made lots of statements about wanting the site to allow relatively free expression, aside from things like doxxing and pedophilia. Ellen Pao has instead talked about turning Reddit into a "safe space", which is a common euphemism for eliminating dissenting viewpoints.

FPH in and of itself isn't the most defensible or tasteful subreddit, but they're going to start by banning the least defensible subreddits first. Once the precedent is made, they can start banning political dissent subreddits.