Why is it that leftist automatically believe that if you vote Democrat, you are a good person?

My mom is a life long Democrat, but she's completely a social conservative.     She would rather kill herself than vote Repub.

This is common with people from working class backgrounds.

The UK's Labour party is filled with social conservative "liberals" who are only concerned about workers' "rights".    They would be far right if they were from a well off background.

I can't accept that anyone knowing Hillary enthusiastically supports partial birth abortions would vote for her if they understood what a partial birth abortion is.  While it can debated whether or not abortions in the first 2 trimesters should be restricted - and restricted to what degree, it is monstrous when people like Hillary boldly defend the right to have a partial birth abortion up until the day of delivery.  That is outright murder of a defenseless human. 
If someone does understand what a partial birth abortion is, and how Hillary supports them, and voted for her… that person will certainly be going to hell if a hell exists  and / or live the rest of their life in their own private hell on earth living with that mindset.  These are probably the same people who would enthusiastically go to a Michael Jackson concert after finding out he diddled 8 year old boys.  At least MJ only threatened people with voodoo curses and didn't actually kill anybody.