Do you think there might have been a relationship between the violence of the vietnam war and the growing climate of violence in the united states during 1968?

Increases in the draft and violence in Vietnam led to more violent protests in the US. 

Anti-war protests hit a height during 1968 with an peak in the draft and increased numbers of soldiers being killed in Vietnam. The protests were violent themselves and were met with violence. The protest at the 1968 Democratic Convention would one of the most violent of the whole period. 

Militarism is the answer.