It's really hard to generalize here. There are some who are brandishing weapons and others who are scared, confused and disgruntled. There is one common denominator here though.
Racism. There are very few black people at these rallies.
Terrorism is another buzz-word like communism to make people afraid and angry. It is usually misapplied for political purposes.
The so-called Tea Party bears little resemblance to the participants of the original Tea Party in Massachusetts. This trumped-up Dick Armey Tea Party is not unified and does not contain any useful vision for the economic woes we face today. It's a reactive party, not a pro-active one.