Having read Ms Berdorf's remark re "butch lezzies" and her attempt to make a joke about "gay bashing", I think she was not a wise choice and it is probably a good thing that she resigned.
As to the remarks about this appointment being illustrative of the "loony Left", I can think of several senior, and far more influential, appointments within the Conservative Party that do not exactly demonstrate a recognition of the need for integrity and diplomacy - for instance:
Liam Fox (now Secretary of State for International
Trade)
who had to resign in disgrace for allowing his friend and best man Adam Werritty to act as his unofficial and undeclared adviser, attending meetings at the Ministry of Defence and expenses-paid trips to meet foreign dignatories without getting the necessary security clearance.
Boris Johnson (now Foreign Secretary) who:
was forced to apologize to the people of Papua New Guinea after writing in 2006 in the Telegraph: “For 10 years we in the Tory party have become used to Papua New Guinea-style orgies of cannibalism and chief-killing.."
in 2002 wrote "the Queen has come to love the Commonwealth, partly because it supplies her with regular cheering crowds of flag-waving piccaninnies .."
who described Obama as " a “part-Kenyan” with an "“ancestral dislike” of Britain."
who, when referring to the Hillsborough tragedy, said Liverpudlians were " wallowing in their “victim status,”
who had to apologise for his remarks when visiting a Sikh temple when he expressed his enthusiasm for whisky and said “Whenever we go to India, to Mumbai or to Delhi, we have to bring ‘clinkie’ in our luggage."
Ben Bradley (Conservative Party Vice Chairman)
who once suggested that unemployed men should get vasectomies.