Yes, tone matters. Tone that sends the message that vaccines aren't effective, as the original poster's tone suggests, is misinformation.
That interpretation was created by you. Somehow you stretched "doesn't stop the spread" (a fact) to "hasn't prevented deaths / hospitalizations" which is in direct opposition to "But definetly[sic] decreased them."
You strawmanned an Icelander, then pivoted to tone policing. Please stop and apologize to the OP. Please reflect and understand that by invalidating people's real lived experiences you are creating more division, more animosity, more "anti vaxxers"! If you can simply reply to misinformation with good information (without strawmanning or tone policing), you will make actual progress on what I hope is your true goal; making people more informed about covid vaccines. If your true motivation is to feel morally superior to random people on the internet, then by all means, continue to debate me.