Not all of them were, that is logically obvious. But what do we do when they go before a judge and tell what they have experienced at home, or by their captor's who used them as mules, or in some other scenario?
Send them away?
Send the 5,000 away instead of feeding them and let them faint and perish in the wilderness? I don't think that Jesus would do that. But again, we cannot take all of the people of the world in that would like to come here, but we can help some, and thus quotas must be set so that we can help those we can. Would Jesus have said “I cannot save all of mankind, so why bother coming down to Earth and giving my life?” No. Like the man who strolled the beach tossing back starfish that washed ashore, he was told that he could save all of them, but he replied that he could save some, and that's what mattered.