Indeed. Abraham was the first Hebrew, the first Jew as it were. As you already explained, he was eager to make a deal to save all of Sodom for the few righteous who may have lived there.
It’s a funny narrative... 50? No, how about 45? Okay how about 40?... Well I don’t want to make you mad, but how about 30? 20? :)
Pretty much boils down to Isaac choosing the sunny side - the side of light - whereas Ishmael chose the dark side. People joke that for the moslems, a day without a bombing is like a day without sunshine. They wake up looking to be outraged and offended about something, especially Jews who by nature want people to live, even their enemies!
I suspect that Ishmael and Hagar got the boot because Ishmael (a teenager old enough to know better) was mocking Isaac because of his cheerful, happy name. And where was Hagar, snickering in the background? Egging him on?
Seriously, what if Isaac was a happy, bubbly baby, and when he laughed and smiled Ishmael started in with a snarling taunt, “Yitzchak tzachak! Yitzchak tzachak!”... (Isaac laughed! Isaac laughed!). Result: happy little Isaac reduced to tears.
It wouldn’t take long for Isaac to learn not to laugh or have fun. He might even come to despise his name (a person’s name is his mission), maybe even thinking his parents were making a joke of him by naming him that.
Just my two cents, but it would explain why Sarah knew those two needed the heave-ho.
And here we are. “Jewish comedian” is kind of redundant, while “Moslem comedian” in an oxymoron.
Two Moslems walk into a Bar............................