The concept of free speech is a huge issue on social media, and the internet in general.
Facebook owns all content that is posted on the social media platform and has control over what can and cannot be posted. However, Facebook has stirred controversy in regards to allowing the depiction of violence, but ensuring content such as breastfeeding, is quickly removed.
Parents want to protect their children from seeing violent events, such as attacks and beheadings, and they often have little to no control over what their children have access to on social networks.
It is a very thin line between free speech and publishing (possibly) traumatizing images for young children and the public to witness.