The post linked to an article by The Wall Street Journal detailing how Parler made more than 50 referrals to the FBI ahead of the violent siege.
If the company thought the post would garner a positive reaction among the site's users, they were wrong.
One user wrote: "To confirm, you are calling for an investigation into big tech collusion while you are colluding with the FBI against your platform members?"
Users vented their fury at the site's apparent willingness to report its users despite its pitch of protecting free speech.
Parler became a popular destination for conservatives and Trump supporters over the past year as social media users sought alternatives to Facebook and Twitter.
According to the Journal, Parler started informing the FBI about suspicious user content suggesting potential unrest at the Capitol in December.
The legal team representing Parler, Michael Dry and Ephraim Wernick, wrote in the letter the examples were "only a fraction of the dozens of posts" sent to the FBI. »