Sith - “... so if death penalty was in Britain back then it should be here now?...”
No - and that's the point. We are discussing Islamic scripture and the laws for man that were laid down in the Koran by Allah, the one and only true God, via his prophet, Mohammed. It's the first Pillar of Islam – Shahadah.
And I repeat - The Koran is immutable. If a practice was acceptable when the Koran was written, it must be acceptable today and in all times both past and present.
“... if women could not get a divorce back then that should happen now?...”
Funnily enough, the same above answer applies.
Do you really understand Islam Sith? I think that you might need further instruction. Perhaps your friend Keyplus can help? Failing that, pop down to your local mosque and have your brain put through a quick wash cycle. That should help.