Militant - themed signs and speeches laced with fear mark political dialogue . Lawmakers on both sides of aisle call on Democrats to tone it down . The theory that terrorists caused the violence is ` ` fallacious , '' professor says . Health care debate starts again in House ; it will be volatile .
Militant-themed messages and speeches laced with fear mark political dialogue . Lawmakers on both sides of aisle call on colleagues to tone it down . The notion that rhetoric caused the violence is `` fallacious , '' professor says . Health care debate looms again in House ; it could be volatile .