Ken,
I wouldn't say that manners are no longer being taught, I would simply say that...at least here in America...so many people are so self absorbed that manners don't even come into the equation. I find that sadder, actually. If they weren't being taught, folks would have a slim excuse for thier behaviour. Having been taught and simply being oblivious, somehow makes it worse.
We all have our pet peeves of other people's rudeness. Two of my peeves are talking at length on a cell phone while walking/visiting with somone and changing lanes without looking/signalling. One is insensitive and thoughtless, the other is thoughtless and dangerous. Both are rude.
Manners are a way to keep society working smoothly, help provide guidelines for those that are shy and/or untrained in a culture, and also provide a basic framework for safe function in a urban culture where there are lots of folks in a small space. Manners may vary from culture to culture, but they do require an awareness of your surroundings and others. So, I think it is a lack of awareness, not a lack of manners, that currently abounds.
As for the "sorry is a sign of weakness". I hate statements that are pithy to the point of absurdity. If he'd been clear instead of making a memorable slogan, he wouldn't appear so assinine and arrogantly ignorant in retrospect. I'm curious, Ken, when you bring it up to him now, does he express any regret, embarrassment, or try to clarify his point?
Sincere apologies are never a sign of weakness and often are a sign of courage. It's VERY hard to admit you've made a mistake, especially when the person you are apologizing to you is important to you Or your apology will lose something valuable to you.. If, as LKB & 7sm have stated so well, it's a quick cover up or used to excuse non-repentant behaviour....THEN it is weakness.
IMHO, a good test:
If you can't immediately answer WHY you are sorry, then you really aren't sorry. You're being reactive.
If you can't answer within a few minutes what you would/will do differently, then you aren't sincere.
In both cases, you should rethink your response.