Eric Clapton stands by Enoch Powell

were those quotes in that article reported at the time?

Looks that way, as Rock Against Racism was formed, at least in part, in response to them:

Originally conceived as a one-off concert with a message against racism, Rock Against Racism was founded in 1976 by Red Saunders, Roger Huddle and others. According to Huddle, "it remained just an idea until August 1976" when Eric Clapton made a drunken declaration of support for former Conservative minister Enoch Powell (known for his anti-immigration Rivers of Blood speech) at a concert in Birmingham.[2] Clapton told the crowd that England had "become overcrowded" and that they should vote for Powell to stop Britain from becoming "a black colony". He also told the audience that Britain should "get the foreigners out, get the wogs out, get the coons out", and then he repeatedly shouted the National Front slogan "Keep Britain White".[3][4]

Huddle, Saunders and two members of Kartoon Klowns responded by writing a letter to NME expressing their opposition to Clapton's comments, which they claimed were "all the more disgusting because he had his first hit with a cover of reggae star Bob Marley's "I Shot the Sheriff" ... Come on Eric... Own up. Half your music is black. Who shot the Sheriff, Eric? It sure as hell wasn't you!". At the end of the letter, they called for people to help form a movement called Rock Against Racism, and they report that they received hundreds of replies.[2]