Rather than acting like everyone else is an idiot, perhaps explain your points rationally. You might even convince some fence-sitters or make folks who disagree

Rather than acting like everyone else is an idiot, perhaps explain your points rationally. You might even convince some fence-sitters or make folks who disagree with you less sure of their positions. But the tone of your comment is very much "it's obvious, you dumbasses" which only entrenches those whose minds you'd presumably like to change.