Is It Rude To ....

The answer to this 質問 really depends on what the person is mad/angry about, though i imagine asking someone if they are mad, when they are obviously angry, is probably just rubbing salt in their wounds. によって the way, rude is when don't use their manners, または they something rude for no reason, like 'fuck you' または 'you are a loser', generally things like that, I would consider rude.

Depends on the person and what they are pissed at
I find it so rude when people piss in my cheerios

Depends.

I find it rude when people bash Harmony.

no it is hilarious. if they don't think so then well jokes on them.
i find it rude when people ignore あなた then have a go at あなた for swearing at them especially because they are stuck up cows also i 愛 annoying people によって asking them who crapped in your cornflakes when they are pissed

It depends on if the person deserves respect at the moment. And if not, あなた could be a little もっと見る creative! For example, 表示する the person this picture I made!