She's clearly not changing her views because of personal growth she's changing them because of what's popular.I'm not for or against Hillary, very apathetic towards her honestly, but what's wrong with being a "flip-flopper"?
As a person builds and grows in life their experiences and opinions can and will change. Things I used to be for 10 years ago, I'm not longer for today. Also new information or science can come out disproving old theories. When things like this happen, any sane person SHOULD go back and review what their accepted understandings were and reassess. Sometimes we get things wrong and we should admit that and sometimes a situation where there are no great decisions might call for a lesser evil selection. There is nothing inherently wrong about being a flip flopper, its only a problem if you cannot explain your case for switching.