"I don't get why being left wing liberal is seen as socially acceptable, and anything else and you are meant to feel shamed by society."
Because, for a start, tory policies, time after time mean that communities are torn apart, people including thousands of children are pushed into real poverty, our assets are sold off, people are made homeless, disabled people are punished, vulnerable people have their safety nets taken away.
Many people suffer and die because of tory policies. I can back this up if you like.
They lie, they make promises they don't keep and hope we'll all forget (remember the pledges at the last election?)
Money is made for big business and the ultra-rich though, so a price worth paying 
If you support the tories, yes, you should be ashamed IMO.