Roblox is a non-governmental entity which can limit your speech. By creating an account, you follow the Roblox Community Guidelines, and breaking them will lead to suspension. By using Medium, you also abide by their rules, which states:
Don’t threaten, encourage, or incite violence against anyone, directly or indirectly.
A rule which you are breaking by stating in your bio:
Lets kill the people who got me deleted for being offended.
Roblox and Medium strive to achieve a safe community for their users. They created rules for you to follow, so that their users do not feel threatened. Your actions, both in Roblox as well as Medium, break them. The Roblox Independent Journal stands by our reporting.