You see the thing about Europe, America and sports; both sides of the Atlantic love sports but treat their athletes differently. Here in the United States, many people will cheer for a black wide receiver for catching the winning pass but will call him a nigger off the field and will never allow him near their daughters. In Europe, it's different. When you're disliked, you'd be disliked, period. There's no sugercoating it.
Racism and soccer go hand in hand and it isn't a new phenomenon. It's been happening since the 1960s. The worst times though, were the 1970s and 1980s. In countries such as England, Spain, Netherlands, Germany and many more, far right nationalist groups and other assorted racist thugs got together during games mainly for fights and commotion. That is when the skinhead movement got hijacked by extremists and thus, the association of skinheads with racism and xenohpobia today. The famous player John Barnes talks about racism in soccer in his memoir. Things were so bad that extreme right wing groups refused to support black players on their national teams.
However, things improved in the late 80s and early 90s and with the very successful French World Cup winning team of 1998 and Euro 2000 (which were very diverse), multiculturalism has been accepted in soccer. Of course there has been a sudden renaissance of racism in recent years and players like Ryan Giggs, Samuel Eto'o, Ronaldinho, Thierry Henry and Ronaldinho have joined the campaign to combat it. Yet, UEFA and FIFA continue to play lip service. I honestly think Samuel Eto's suggestion would work - his suggestion is that in an incident of racial taunts, all the black players should just walk off the field in protest, regardless of retribution. I think that'll work because when a number of teams miss key players, lose games and pressure FIFA, they'll take action.
However, most teams for the most part are pretty decent and can tolerate black players , especially English teams. In fact, English teams are some of the most diverse in the world of soccer which is great, of course.