I’ll add 2 more: The nuclear family tends to be socialistic, even communistic. Which is fine for a group of people related by blood and who reciprocate unconditional love toward each other. But that relationship doesn’t translate upward into anything bigger than a family group. Not even a tribe, and certainly not a nation. Liberals either don’t understand this, or they desperately wish it were so (perhaps because they were missing something in their own family lives, so try to force the society to make up for it writ large).
That is a big part of it I think. They see small groups that get along and support each other, and try to move that to all groups.
That actually makes sense, when dad isn’t there, the state is your dad.