Paedophilia was not accepted in the 70s. But a paedophile supporting group was allowed to have affiliate status to the NCCL.
The NCCL in 1976 campaigned to lower the age of consent to 14.
But this did not happen because society did not approve.
There are people who want the age of consent lowered to 14 today as well. But society is against it, just as society in the 1970s was against the campaign of the NCCL to lower the age of consent to 14.
This is from Peter Tatchell
"In Britain, consent at 14 has been supported in the past by the National Council for Civil Liberties (now Liberty) and the Howard League for Penal Reform. Even the ex-Bishop of Glasgow, Derek Rawcliffe, and the late Bishop of Woolwich, John ‘Honest to God’ Robinson, have backed 14 as fairer and more realistic. I don’t often agree with Anglican bishops, but in this case they are right: we do not protect young people by threatening them with arrest and imprisonment. Education and empowerment — not criminalisation — is the best protection."
www.freedominapuritanage.co.uk/why-the-age-of-consent-should-be-lowered-to-14/
and apparently the idea was floated by the Number Ten Policy Unit.
'No 10 policy unit 'suggested lowering age of consent to 14'
Lowering the age of sexual consent to 14 and allowing public nudity were among ideas suggested by Downing Street officials drawing up new laws on personal freedoms.'
...
''The Prime Minister considers the idea of lowering the age of consent to be offensive,'' he said, insisting there were no plans to do so.'
www.telegraph.co.uk/health/healthnews/9794842/No-10-policy-unit-suggested-lowering-age-of-consent-to-14.html
The general population in the 1970s was far less liberal than they are today. But it seems that in the 1970s there existed more radical and liberal forces, as the former chairman of PIE told the BBC, and that some of these radical and liberal forces even supported paedophile groups and that is why PIE could end up being affiliated to the NCCL.
"He told BBC Radio 4's Today programme: "Really they didn't do much to oppose PIE's presence in my view because there were these other liberal forces, or radical forces, within NCCL.
"The support didn't come from Harman and Co but it was there. The Gay Liberation Front was very radical and at that time Harman and Patricia Hewitt couldn't just kick out PIE. Well, they could both try but they didn't even try and the reason they didn't try is they didn't want to rock the boat because their careers within NCCL depended on them not rocking the boat too much."
www.huffingtonpost.co.uk/2014/02/26/pie-harriet-harman-rock-the-boat_n_4856460.html?utm_hp_ref=uk