I suspect the comment where you were banned was the proverbial "straw that broke the camels back." I took a look at the rest of the thread where there could be the impression of you attacking people. It's not as extreme as the specific comment they chose but it's there. Perhaps the mods banned you for 3 days for a combination of your posts in that thread. That would make sense instead of commenting on each individually (which would be time consuming).
Have you tried to message the mods directly for clarity before posting here?