The U.S. wants to destroy Russia because its a geopolitical rival. From David Sant at thesaker.is:
During its rise to world domination, the City of Rome had one major competitor, which was its equal in every way. That city was Carthage, located 370 miles away, on the South side of the Mediterranean Sea.
Carthage had been planting colonies around the Mediterranean and Atlantic for over a century before Rome was even founded. As Rome rose to power, these two Mediterranean cities fought two wars for control over the Island of Sicily, called the Punic Wars. Despite an admirable performance by Hannibal who managed to invade Italy twice and inflicted a terrible defeat on the Romans at Cannae, Carthage still ended up losing both wars.
At the close of the second Punic War in 201 BC, Carthage was conquered by Rome and placed under a special administrative status that disallowed it from fielding a navy or overseas military without permission from the Roman Senate.
Carthage was one of only three powers that ever managed to directly threaten Rome during the days of the Republic, the others being the Gauls who sacked Rome in 390 BC, and the Macedonian Greeks, who were defeated in 197 BC.
The Roman attitude and behavior toward Carthage then was very similar to the Anglo-American attitude toward Russia, today. The main “sin” of Carthage in the eyes of the Romans was that it was equal in power and influence to Rome. And for that sin, it had to be destroyed.
Cato the Elder was a Roman soldier, who later became a Senator and famous orator who gave many speeches in the Senate even after his retirement. Over a period of forty years, he routinely ended his speeches on any subject with the statement, “And furthermore, I consider that Carthage must be destroyed!”