The left tends toward the totalitarian. And every totalitarian ideology seeks to weaken the bonds between children and parents. The left seeks to dilute parental authority and replace it with school authority and government authority.
Prager, D. (2016). 10 Reasons Left-Wingers Cut Trump Voters From Their Lives. Downhill. Available http://townhall.com/columnists/dennisprager/2016/11/29/10-reasons-leftwingers-cut-trump-voters-from-their-lives-n2252012. Last accessed 9th Dec 2016.