West Ham United’s controversial official supporters’ board has lost one of its members after the representative for away season ticket holders resigned following accusations of antisemitism, homophobia and racism.

Nik Tucker agreed to step down after posts on his website, Crossed Hammers, were brought to the attention of Kick It Out, football’s anti-discrimination charity, last month. Kick It Out contacted West Ham about the posts, which portrayed orthodox Jews as Tottenham fans, aimed homophobic slurs at Brighton & Hove Albion and used racist language to caption a photo of two Asian Liverpool supporters.

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A page on the Crossed Hammers site offering information for West Ham fans about away games against Tottenham showed a photograph featuring a large gathering of orthodox Jews and was captioned: “Shite Hart Lane will be a sell out this season with half-price season ticket discounts”. Another showing orthodox Jews looking in containers that appear to be bins was captioned: “Spurs! The Scousers of London!”

Homophobic language was used to caption a photo of a Brighton fan, and the website described Liverpool as “Bin Dippers” and Cardiff City as “sheep shaggers”. Some of the posts have been deleted.

A West Ham spokesman said: “West Ham United can confirm that following some of the content on his website being brought to the club’s attention by Kick it Out, it was felt by both parties that it was no longer appropriate for Nik Tucker to hold a position on the official supporters’ board. As such, Nik offered his resignation, which was accepted”.”

A Kick It Out spokesman said: “We welcome the fact that within a few hours of receiving the complaints West Ham took swift action – homophobia and antisemitism has no place in football.”

The OSB, which was formed this season and is set to hold its second meeting on Wednesday, has faced criticism after the Guardian reported that one of its representatives has expressed support for the Democratic Football Lads Alliance, a group condemned by anti-racism campaigners.

Kick It Out contacted West Ham after receiving complaints about Greg Smith, who was present when the 18-member OSB held its first meeting with Karren Brady, West Ham’s vice-chairman, and other club officials in November. Smith, a West Ham season-ticket holder who is on the OSB to represent 1966 season-ticket holders, attended a DFLA march in London in October.

West Ham did not take action to remove Smith from the OSB after being alerted to his support for the DFLA. The club has said representatives were selected by an independent panel of four, which included Sir Trevor Brooking. It has not answered questions from the Guardian regarding whether it conducted background checks or reserved the right to veto members.

“Unfortunately I have had to part company with the Official West Ham United Supporters’ Board by ‘cough’ mutual consent,” Tucker wrote on the Crossed Hammers Facebook page this week. “I suppose my face and humour just doesn’t fit. Thanks for those who put me there with your recommendations but I suppose we are just dinosaur fans who the club would like to be extinct.”