Well, it was women's rights really. The issues affected, and had consequences for the life and limb of women. 'Reproductive rights' sounds so reductive. And Americanised. Women's rights to choice, safe pregnancies, and not to become an incubator whose life was secondary to an unborn child. Even with an unviable foetus. To be treated with respect and dignity.
Long battle for women. From women's inability to access contraception (for religious/ideological reasons). Women's inability to control their own fertility and knowledge that they would not be saved in situations like Savita Halappanavar. Or like Natasha Perie, although brain dead, left on life support as an incubator to support a pregnancy. Only ended with a court case.
I would be sceptical your accusation is true, but indeed many different groups can work together on social justice campaigns. I remember what passed for 'left' in Ireland marching with religious groups on various social justice campaigns. I can't remember exactly what for now, but it would have probably have involved such things as inequality and unemployment. Indeed the Irish Anti-Apartheid Movement (IAAM) was one such a campaign
The success of our campaigns derived from the fact that at every opportunity every effort was made to make the Movement as representative of every aspect of Irish life as possible. Over 30 years of its existence, the IAAM involved the entire spectrum of Irish life - parliamentarians, trade unionists, religious organisations, students and ordinary people - in its objective to isolate the apartheid regime and to provide solidarity to the people of South Africa.
That was a good while ago, of course. If it was now, I would not be at all surprised if similar self-ID 'progressives' would be trying to smear the the Irish Anti-Apartheid Movement as being a terrible thing. Accusing them of being on the wrong side of history, I would imagine. Considering that trade Unionists and Students were tainted in the same movement as religious right wing people.
www.sahistory.org.za/sites/default/files/IrishAAM-Mottiar.pdf