How far can you carry a metaphor?

This quote is from someone who calls himself Duke McGoo:

Our civic self-esteem has evaporated. The moral relativists have destroyed our pride and our will to continue as a high end society. Men like communist Pierre E. Trudeau lit these fires and filthy horn dogs like Bill Clinton turned up the heat allowing pigs like Michael Moore to roast weenies of despair.

Weenies of despair! I am speechless. With admiration. Or something.