President Obama has not only refused to attend the funeral of Lady Thatcher, he has refused even to send an envoy*. He will have been told that this is an important occasion for Britain, America's ally, and that the Queen is attending, but he clearly wants to send an open snub.
Obama doesn't like us. I hope we bear this in mind in our future dealings with the USA.
*that is to say someone senior from his administration; George Schulz and Dick Cheney are going.