Rudolph Rummel quotes
It should be underlined that while the democratic or state socialist believes that socialist governments will be peaceloving and nonviolent, the Marxist-Leninist believes this true of only the final, communist stage of stateless anarchy. The socialist transition period may well involve war with capitalist states, but while this inter-state war is to be avoided if at all possible in this age of nuclear weapons, the world-wide struggle against capitalism must be pursued by all means short of inter-state war. This would involve not only the arts of deception, disinformation, subversion, and demoralization, against capitalist states, but also terrorism and domestic wars through ‘national liberation fronts'. For the Marxist-Leninist, then, it is the communist system that is inherently peaceful, not the socialist intermediary state. This socialist stage means the purposeful, aggressive use of force and violence to pursue the final, global stage of communist peace and freedom.
Rudolph Rummel
Socialism aside, there also has been a rejection of Western values, of which individual freedom is prominent, and acceptance of some form of value-relativism (thus, no political system is better than any other). In some cases this rejection has turned to outright hostility and particularly anti-Americanism, and thus opposition to American values, such as freedom. To accept, therefore, that democratic freedom is inherently most peaceful, is to the value-relativist, to say the unacceptable-that it is better.
Rudolph Rummel