The only person I unfriended on Facebook was someone I know fairly well who, at the height of the Iraq Stupidity, was making "jokes" that felt more like threats.

Now I ignore the personal insults (although I'm surprised why people feel the need to argue by insult and play debate as a blood sport to  hurt your feelings rather than destroy your arguments) and try to be measured and polite.  So far, that's worked in keeping a dialogue going.

I'm looking for places of agreement, if at all possible.

Solar IS Civil Defense