Oh please. The rudest are the white people. I had an old couple talk through the entire movie, Nebraska. I literally wanted the beat them to a pulp. Rude as heck. Same with cell phones. White young brats. You need to get out more.
So, what enraged you the most, that they were old or that they were white.
Judging by your reference to "white young brats", I'm assuming that advanced age is your bugaboo.
Maybe you should seek professional help before acting on your fantasies.