It is proper Netiquette to pick a user name that does not offend people. Don't pick a controversial username.
User names are chosen for account profiles to represent the account by name. Some refer to a user name as a handle. It is often left as a signature for engagement.
Religious names are common. Religious actions as user names are extreme as one example. Abbreviated curse words are an example of another offensive handle. They discourage engagement by mainstream users due to offense.
Refrain from using offensive usernames because it is extreme to be recognized as offensive.