so far, anti-Obamacare town hall protesters have been called:

1. an angry mob

2. astroturfers:
Leftist Bloggers Who Get Marching Orders from Obama Attack Protesters as "Astroturf"

3. racists:
example 1
example 2

4. political terrorists

5. Un-American

6. like the KKK

7. like Hamas and Hezbollah

8. evil-mongers

9. thugs who attacked civil rights marchers

10. close to Brown Shirt tactics

11. Neanderthals

12. Functionally Retarded Adults:
Garofalo: Tea Party Protesters 'Functionally Retarded Adults'; Says 'I Want My Country Back' Code for 'I Want My White Guy Back'

13. undermining the country

14. Right-Wing Domestic Terrorists

15. subverters of the American Democratic Process