"Democrats are more social,.. they have a higher trust factor in their fellow Democrat's. We gather as groups to try and find ways to help others who are not faring as well.. We like being together."
Leftists fight amongst each other ALL THE TIME, since they include so many groups that are rigidly opposed to each other. Radical gays vs. Radical muslims, feminists vs. Transgenders, radical environmentalists vs. Labor unions in industries the environmentalists hate such as mining and logging, and so on.
Hell, just look at how many DU threads devolve into furious infighting, often for extremely petty reasons.