What country has been a greater ally? What acts of being an ally have they done for us? They have been takers, and always trying to torpedo us. 30 years after the revolutionary war they attacked us again. Then during the Civil War they sided with the south and tried to split us up. They use subterfuge to take over our banking system with the federal reserve. They threatened to sink our neutral shipping if it was going to Germany and wailed unmercifully about Germans sinking ships going to England. They got us into World War I when we had no interest in it. They demanded American soldiers be placed under the incompetent leadership of British generals piecemeal. Thank God blackjack Pershing refused. After the war they regarded us as a future enemy in the Washington naval treaty and insisted we not have as powerful of a navy as they did. They prolonged World War II by pushing us to help them regain British colonies in the Mediterranean . They tried to get Eisenhower to help them recover the Suez canal in the 50s. The British empire is the genesis of all of the problems in Kuwait and Iraq. They pay Isis members pensions. They spy on us constantly, and used their spy agencies to try to frame Trump as a Russian spy and a pervert. That sure is an interesting kind of “ally”.
Our “special relationship” with the UK, which began, arguably, with Theodore Roosevelt, hasn’t always worked well, but when it came to NATO, the British were solid parners. They even allowed us to base bombers, missiles and nuclear submarines in Britain. The “special relationship” reached its apogee under Ronald Reagan and Margaret Thatcher, when the two countries worked together on issues such as the Falkland Islands, Grenada and Pershing II missile deployments.
You didn’t suggest a ‘greater ally’.
Life is complicated, and so is Statecraft. Nations have their own interests to be concerned about even as they have allies.
Some people can’t seem to deal with that complexity...