"John, in your own opinion, is it possible to be a fundamentalist without literally believing (for examples) 1. that God ordered Abraham to kill his son Isaac, as a test of faith, and then praised and rewarded him for being willing (however reluctantly) to do as he was told.
2. that God ordered the Israelites to kill a number of groups of heathens to the last man, woman, and child?"

Sure, I suppose it's possible for a fundamentalist to do an honest and thorough search of the Bible, using good methodology, and conclude that those examples weren't "literal".

That said, I think I can safely say that every fundmentalist that I know would tell you that those two passage describe real, historical events.

....BUT...

...not all of them, or even (in some cases) meaningful majorities of them would tell you what you must conclude about those historical events.