Why do some people find it absolutely necessary to trash other people's customs? Say the Roma people...?

I find the fact that some people slander other people's names and customs and then go on, all whoop-dee-doo. It is absolutely revolting! Like how some people just murder the Roma (or gypsy) way of life, by saying rude, slanderous, and spiteful things, just from a bad personal experiance, or a friend of a friend's sister's cousin's aunt's bad experiance. Ever heard of that game Telephone? How one person starts at one oend, whisper a simple phrase to someone, and it pes down the line, and how there's that ONE person who completely switches it around? Well, that's Life. Yay. I have an idea! Why don't you just politely refuse and go about your day if a Roma wants to do a job for you. And you know- not ALL of them are like that. I know! It's hard to believe, right? WRONG. It is very easy to believe, just like Don't Judge A Book By It's Cover, or Every Family Has It's Black Sheep. So, I wanna hear some feedback. 'Kay?? Later.