Facebook’s ad platform enables discrimination based on age, sex, and race. That means, Facebook enables advertisers to display ads only to say, whites, or only to young job applicants or only display nursing jobs to women. It is a sneaky way for firms to discriminate against groups of people – generally without any risk of being caught because the target selector is secret. Thus minorities never see housing ads targeted at whites and will never know that Facebook is a friction-less platform for illegal discrimination.
Facebook is incredibly ugly and they use the data against you.

In 2016, ProPublica discovered that Facebook’s algorithms allowed advertisers to exclude users based on race when posting housing ads, and as recently as the end of last year the company hadn’t changed that. And Roger McNamee, a high-profile, early investor in Facebook, wrote recently that Facebook is essentially an “unguarded platform” and an ideal target for abuse. He offers as an example a firm that was harvesting data on users interested in Black Lives Matter and selling that data to police departments; Facebook didn’t do anything until the news became public, and essentially slapped the firm on the wrist.

Source: Mark Zuckerberg Is Sorry Your Data Was Stolen and Will Actually Try to Keep It Safe Now
This discriminatory use of Facebook was going on as recently as the past few months. The root cause problem is Zuckerberg.
No one should continue using Facebook.