It may be nitpicking, but the phrase you used ('Why do you think X?') is very common for making passive-aggressive contradictions. ("I have a smart cat." "Why d

It may be nitpicking, but the phrase you used ('Why do you think X?') is very common for making passive-aggressive contradictions. ("I have a smart cat." "Why do you think cats are smart?") If you've been hanging around the internet for a while you tend to start seeing an unspoken 'you idiot' on the end of it, even when it's not there. You could well have been downvoted more or less on reflex because of that.