People we used to talk all night yesterday are complete strangers today

Its the sad truth

Explanation:

Humans are an interesting species and unfortunately we have these handy dandy things called feelings, and for some people they can change very easily. To add to that, everyone changes in some way or form whenever they compare themselves to the past. So although it's a sad thing sometimes even your closest friend you used to talk to everyday to, will suddenly change or they do something so out of hand you don't feel the same around them, so the two of you stop talking little by little and eventually completely. The same can be said in the case of a relationship between boyfriend and girlfriend, except typically, one person ends up more hurt than the other and their lives can be, sometimes, drastically changed afterwards, all from one event. But that's why there are always opportunities to surround yourself with new people that will accept you for who you are.

i think she wanted to protect her children from the extreme racism of the american south.