Final answer:
The central idea is that America is united despite its cultural differences.
Step-by-step explanation:
The central idea of the paragraph is that America is a united country despite its cultural differences. The author emphasizes the interconnectedness of different cultures and ethnicities within the nation, using the example of Arab and Jewish cabbies chauffeuring passengers regardless of their backgrounds. The paragraph also highlights the existence of conflicts and hostilities within American society, but asserts that the country remains intertwined even in its divisions. Ultimately, the point being made is that America's diversity is both its strength and its challenge, as it strives to foster unity amidst cultural differences.
Learn more about Unity amidst cultural differences in America