A gay and lesbian rally against homophobia in Adelaide has ended in violence after it was crashed by Christian protesters, with one person being removed by police.

About 200 people gathered outside parliament on Saturday to rally in support of International Day Against Homophobia and Transphobia when members of the Adelaide Street Church showed up.

Rally organiser Jason Virgo said one woman was pushed out of her wheelchair and police had to be called.

"A small number of right-wing Christians came out and started waving their flags and getting in people's faces, yelling quite loudly, some of them got in a bit of a fight," Mr Virgo told AAP.

"(They had) signs saying 'God hates sinners' ... no sign should say 'God hates'.