This pretty much sums it up Richard.
If your a Red then the Tories are scum and do terrible things which are offensive, when pointed out that their very own party behave in exactly the same way then we ignore it or point out more wrong doings by the Tories.
If your a Blue then Labour are scum and do terrible things which are offensive, when pointed out that their very own party behave in exactly the same way then we ignore it or point out more wrong doings by Labour.
The very same people can go to the match last night and then post that they think Everton played well and were well organised, but wouldnt even consider watching the televised debate tonight and then post how well the other leaders did - they are so biased their own sense of common decency would prevent it.
Meanwhile the rest of us feel even further disenfranchised by the main parties and look in vain for someone to support.