At the risk of falling foul of Godwins law.....
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The human rights act was set up as a reaction to the appalling abuses perpetrated by the state. In that case, all the concentration camps, death camps and slave labour was perfectly legal under () German law.
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The HRA is there to stop abuses by governments, the same people who draft the laws. So saying the laws of a nation should be above the HRA effectively makes the HRA useless.
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That being said, the HRA does seem to have been abused in some cases, particularly where someone uses it as a shield when they themselves are effectively promoting breaches of the HRA ("I have a right to a family life even though I am preaching that all jews should be killed" or even better "My right to free speech means I can call for anyone who offends the Prophet to be killed")
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There is also a problem with the perception of the HRA and judgements. There was the case of the illegal immigrant who was allowed to stay "because he had a cat".
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The real story was this chap had outstayed his (student I think) visa. They were trying to deport him but he was fighting on the grounds that he had a life here. In particular he had a long term (British) girlfriend whom he lived with. This was the basis for "family life" as deporting him would effectively break up the relationship. To prove that they had a long term stable relationship various bits of evidence were produced, testimony from friends, a joint tenancy agreement, and one bit of evidence to show that they were in a stable and potentially long lived relationship was that they had bought a cat together.
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Not quite the "loony Human Rights" story it first appears.
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I would advocate the UK pushes for more balanced judgments by the ECHR and for the ECHR to limit it's attention to major class actions rather than individual cases, rather than scrapping it entirely. To date the ECHR seems to have been very "by the book" and legalistic. It needs to be more flexible in order to recognize when it is being "played".