Anger is a communication tool. (That means you could handle the situation with a different tactic.)
Anger gets results but is not an uncontrollable response: it is a choice to get what you want.
As a power dynamic, the angry person wants to get into a fight ultimately to force your submission or your irrational anger. Anger moves reason into emotion and forces the relationship into a dominance game.
If you respond with a ‘stiff upper lip’ or ‘grin and bear it’ but you are still angry, you are just controlling it, which can lead to resentment and retaliatory revenge.
The trick is to see their anger as a ploy that will convert you into adversaries. Anger is frustration and a desire to win to avoid fear or insecurity; it is a means to dominate or decimate through emotional manipulation.