How we cite our quotes: (Sentence)
Quote #4
With the existing colonies or dependencies of any European power we have not interfered and shall not interfere. But with the Governments who have declared their independence and maintain it, and whose independence we have, on great consideration and on just principles, acknowledged, we could not view any interposition for the purpose of oppressing them, or controlling in any other manner their destiny, by any European power in any other light than as the manifestation of an unfriendly disposition toward the United States. (15-16)
Monroe continues to distinguish the U.S. as the protector of the independent from the evils of European power. The Latin American republics are clearly seen as an extension of—or at least connected to—the U.S., otherwise their takeover wouldn't be seen as a threat to the United States.
Quote #5
It is impossible that the allied powers should extend their political system to any portion of either continent without endangering our peace and happiness; nor can anyone believe that our southern brethren, if left to themselves, would adopt it of their own accord. (23)
The Latin American independent countries all became republics, just like their friendly neighbor the United States. The fact that they chose republicanism over monarchy proves the American system is preferable, and that no one would choose monarchy over republicanism. The Latin American republics got the idea from the American Revolution, which clearly ties these independence movements together in such a way that if you threaten one, you threaten them all.