Why did the UK government agree to the sillier parts of the Human Rights Act & the European Convention on?

There is something decisively wrong with countries with so many different interests pretending to all agree. For instance Germany gets 90% of its energy from Russia. Russia did not want Libya to be attacked so naturally now Germany is against it. There are just so many issues where it goes against our values. For instance Europe is telling Britain, which is often cited as the home of Law, what to do. We have some of the greatest minds in the World yet we act as if we need a group of feckless Eurocrats in Brussels to tell us what to do. The example you use just shows how much common sense if lacking.