How we cite our quotes: (Act.Scene.Line)
Quote #7
ITHAMORE: Do you not sorrow for your daughter's death?
BARABAS: No, but I grieve that she lived so long an Hebrew born,
and would become a Christian. Catso diabola! (4.1.16-18)
Well, duh, it's a personal betrayal. But Barabas is particularly disgusted by Abigail's conversion because he can't conceive of ever doing it himself: think of how he reacted when Ferneze asked him to convert earlier on. Genuine conversion is pretty much the opposite of everything that Barabas stands for.
Quote #8
For, so I live, perish may all the world. (5.2.10)
Questions about Barabas's character? Look no further than this over-the-top, crystal-clear desire to survive without any regard for anybody else. But does this really sound right? If Barabas's real goal is simply to live, then why not just follow the advice of his fellow Jews in Act 1 and lie low? Isn't it weird that Barabas seems to go out of his way to imperil his life?
Quote #9
CALYMATH: Ferneze, speak, had it not been much better
To keep thy promise than be thus surprised?FERNEZE: What should I say? We are captives and must yield. (5.2.4-6)
Now that Ferneze's plan to fight back has failed, has to yield, too. Unlike Barabas, he doesn't have that maniacal "Me, yield? Never!" attitude; rather, he sees giving in (for the moment, anyway) to be the only reasonable solution. And guess who's alive at the end of the play.