tn The figure is aposiopesis, or sudden silence. The main verb is deleted from the line, “how long … this evil community.” The intensity of the emotion is the reason for the ellipsis.
sn It is worth mentioning in passing that this is one of the Rabbinic proof texts for having at least ten men to form a congregation and have prayer. If God called ten men (the bad spies) a “congregation,” then a congregation must have ten men. But here the word “community/congregation” refers in this context to the people of Israel as a whole, not just to the ten spies.