The Labour Party was founded to represent the interests of the Labour movement and working people. This is also why it's called the "Labour Party", and not "The Progressive Party" or "The Social Liberal Party".
This is also why it has been a longstanding tradition in the party that social issues are matters of conscience, which is why there have always been a wide variety of views on these issues. This also helps explain why support and opposition to Abortion and Homosexual Law Reform has always been bipartisan.
People who do not understand this are misinformed, insane and are not worth listening to (there are many).
In more civilized countries like Canada - we see that the interests of working people are the same as the interests of women, visible minorities and gays and lesbians - all for one and one for all - and retrograde social conservatives have all been expelled from the NDP (Labour) and from the Liberal party - too. Get with the program and throw those religious freaks who try to pass as leftists to the curb - they do not belong in a party of the left!!!