There is a distinction between real life and online. Psudonimously posting under a screen name is very different from making real life statements as yourself.

If you chose to be yourself online that is your choice. You can be someone else on the internet. You can choose to be an asshole on ocasion, that’s kind of the entire premise of trolling.

“Yourself” is the totality of everything you do. You don’t get to do stuff and then decide “No, that wasn’t me, it doesn’t count”. If you that you’re just deluding yourself

Too often though, such arguments are used by others in the attempt to define a person by one specific example in ignorance of everything else that person is.