The deletion of an Instagram account belonging to a mother whose Marine son was killed in Afghanistan last week was a mistake, parent company Facebook said Tuesday. Shana Chappell raised an alarm on Facebook on Monday after she said her account was removed. Chappell said she believed the deletion was “because [I] gained so many followers over my [son’s] death due to Biden’s negligence, ignorance and him being a traitor!” She was referring to President Joe Biden. The post in question described “my heart break [sic] over my son,” according to Chappell. Facebook acknowledged the account was deleted but said it has now been restored. “We express our deepest condolences to Ms. Chappell and her family. Her tribute to her heroic son does not violate any of our policies,” a Facebook spokesperson told news outlets. “While the post was not removed, her account was incorrectly deleted and we have since …