I'm sure that sounds much better in the original German, so here ya go:
Raucher sind MEISTE rude, Selbst-zentrierte Leute auf dem Gesicht dieses Planeten DAS EINZELNE.
Actually, people who hijack airplanes and fly them into large buildings are the single most rude, self-centered people on the face of this planet. Followed by:
2. "Suicide bombers".
3. Spree killers.
4. Self-styled "civil rights" activists.
5. People who play their car stereos loud enough to register on the Richter Scale.
6. People who put loud obnoxious car alarms in POS cars that no self-respecting crook would be tempted to steal.
7. People who do not flush.
8. People who think the right to murder an unwanted baby is the most important civil right in the world.
9. Drug addicts.
10. Other Democrats.
11. Smokers (although some of the ones here may be worse than Democrats).