Nigel Farage is dealing with fresh allegations of racism and homophobia in his party only days after the local and European elections as Ukip was forced to launch an investigation into comments made by one of its newly elected councillors.

Dave Small, who was elected to Redditch borough council on Friday, faces being kicked out of the party for referring to gay people as "perverts" and African immigrants as "scroungers".

In comments posted on Facebook, he also attacked BBC broadcaster Clare Balding and singer Elton John over their sexuality and referred to "our sworn enemies in the Muslim world".

Stonewall's acting chief executive, Ruth Hunt, condemned the comments, saying Ukip would be "judged by the company they keep".

She said: "These reprehensible views have no place in modern Britain. We hope the party leadership reviews these comments as a matter of urgency."

A Ukip spokesman said the party's national executive committee would look into the posts and decide what action to take. Similar offences in the past have seen members kicked out of the party.

The spokesman said: "All Ukip members and councillors are expected to uphold the values of the party. Where there are allegations that that has not been the case, there is an established disciplinary procedure, which is under the auspices of the national executive committee. We will certainly look at this case."

The spokesman added that there were already "quite a few cases pending".

Small's Ukip colleague Stuart Cross, who represents Redditch South on Worcester county council, said Small was "not wanted" and should resign over the comments. He tweeted: "If the new cllr has said that. Then he gets no support from me. He should resign without hesitation as those views are disgraceful."

In a post on his Facebook account last June entitled Britain used to be for the British, Small wrote: "Our once great country has become the dust bin for all the world wide money grabbing scum."

He added: "Why on earth is this useless Goverment pandering to Puffs? I refuse to call them gays, as what has gay to do with Perverts like Elton John and Clair Balding who get their jollies in such disgusting ways. to sum up, they should not allowed to be married, they should go back to the closet."

In February 2013, he referred to gay people as "perverts" and expressed opposition to "poofs and dykes" being allowed to marry. And he predicted that "thousends mor scroungers" would soon arrive in the UK from Mali as a result of a range of coalition government policies.

Small also complained in a November 2012 post that he was not allowed to use the term "Paki". And, in June that year, he wrote: "I visiting the city of Birmingham recently and felt like a foreigner in the city of my birth, all around me I could hear the sound of jabbering in an alien voice … we also have the Pakistani' and the Somali's. Tell me Mr Cameron Why? the men wear their Pyjamas."

His comments are just the latest to cause problems for Farage. In February this year, Ukip councillor David Silvester was kicked out of the party for saying that gay marriage was to blame for the storms that lashed Britain last winter.

Farage himself faced criticism after insisting that people would be justified in worrying about Romanians moving in next door. And, in April, Ukip donor Demetri Marchessini told Channel 4 News that a man could never rape his wife because "once a woman accepts, she accepts".

Last week, BBC News' Jasmine Lawrence was removed from the corporation's election coverage after tweeting a derogatory comment about Ukip as the country was about to go to the polls.

The party made gains in the local elections, prompting Farage to claim that the "Ukip fox is in the Westminster hen house". But the BBC's projected national share figure showed Ukip got less than the 23% it had in council elections last year. Moreover, the party does not control any local authorities.

Anti-Ukip campaigers Still Laughing at the UK Independence Party said Dave Small was "another example in a long list of Ukip candidates who, having just been elected as a councillor, reveals himself on Facebook as a racist and a homophobe".

Small did not respond to a request for comment.