I just wanna put in my two cents.
What I call prejudice is the way you approach (a group of) people. That you treat them differently based on clothing, nationality, etc.
I don't dislike gypsies as a group, I don't know any gypsies. I like to approach every person as an individual. With me, I respect you if I don't know you. You can stabilize that respect or ruin it.
As the situation is in Holland, we have many Maroccan, Turkish, Saudi Arabian, Polish people and people from the Dutch Antilles. A fact is that, at least where I live, the majority of crimes are perpetrated by members of these racial groups, mainly Marroccan and Dutch Antillians. But I try, and as far as I'm concerned I manage pretty damn well, not to approach them differently than I approach any other person of my nationality / racial descent. Or say whenever drugdealers have been arrested, say: "Probably be one of those foreigners." Although it is, regretfully, mostly true.
I like everyone. Until proven different.