What I don't get is why she is the scape goat when there are tons of other actress who were "homewreckers".
I think the reason why Angelina is so reviled is both a question of timing and exposure and also of PR spin.
Brad, Jennifer and Angelina are superstars so of course reactions are going to be exacerbated when it comes to them.
Nobody cares about Laura Dern or Bridget Moynahan so they get a pass for having affairs with married men when more famous women get a raw deal for the same offense (not that I would call the Brad and Angelina relationship an affair in the physical sense, but that's beside the point).
The second reason is that celebrities in the age of TMZ and Internet are no longer 'sacred monsters' who can get away with outrageous behavior because of who they are.
People now expect them to behave with the same moral and behavioral standards as ordinary people. It partly the fault of the stars themselves who have worked hard to market themselves as 'just like us', and partly because of the paparazzi and celeb blog culture that shows them 'warts and all' 24/7 and takes away the magic.
Think about it, nobody calls Elizabeth Taylor a 'w****', even though she had an affair with and married her best friend's husband. Paul Newman and Joanne aren't called trash even though they were both married to other people when they started a relationship, etc.
Stars back in the day could get away with bending moral rules. Angelina simply can't.
Another factor is luck and image control. For example, Halle Berry has two hit and run on her record, yet she has this very positive image as a class act.
In my book, leaving somebody for dead at the side of a road is infinitely worse than having an affair but Halle is very lucky that she has good 'fixers' and PR people and so she got away with it.
On the contrary, and especially at the beginning, the press was very vicious towards Angelina and she had little control over what was written about her. It got worse when Jennifer spun the story to her advantage (with that weepy VF interview) and as a result Angelina's image was very damaged and it has been an uphill battle even since to restore it (with the charity and the children, etc).