It isn't really that hard to understand comments like that are out there and sometimes from those you'd think were better than that. But TV, movies, even commercials show such selfish, rude behaviors in adults, what will the kids be like after hearing all that. This gotta buy, gotta have, attitude. gotta get mine, what's in it for me attitude.
Stand by your own standards and let the rest of the world roll off your back. You're doing good. They aren't and they know it, so they try to make what you do wrong. shame on them.