It's more happy accident than anything that liberals are getting ban-hammered on Facebook.
I recall reading somewhere that facebook has automated their process for banning/suspending people: basically it's now set up like an algorithm and if you post/share shit, the odds of being banned/suspended, depend on how many people reported the picture you spread, making it radioactive/poison pill and it's negative effect depending on other factors (like how many times you've been reported and so forth).
I also recall reading that a lot of troll reporting groups have a ton of dummy accounts designed to flag/report accounts of people they want banned from facebook for posting unpopular opinions. There are a lot of strategies (for instance, at the height of the purging of trannies who use aliases on Facebook, there was a concentrated movement by conservatives to ban trannies who were anti-police/anti-military via mass reporting them)