Yep. Most of the time online you won't convince the person you're arguing against, BUT to convince people reading the thread. For the most part, arguing online is performative, for the purpose of the audience rather than the participants.

"You worship single-party states, not caring about worker enfranchisement - you're not a communist - you're a red fascist that gives communism a bad name."

"What kind of half-arsed unprincipled Nazi are you? You're posting here rather than emulating your furher, who shot himself."