To me the launch trailer clearly portrays The Institute as the evil bad guys this time around. And that the synths are supposed to be sympathetic and downtrodden.
In both FO3 & FNV I fought against slavery and oppression.
I guess this time I get to be a bad guy because a machine is a machine. They are not "non-human persons". They are assembly line collections of wires and circuit boards. Just because a toaster can walk and talk and "think" as dictated by its programmed logic functions does not make it anything more than a toaster.
If I build a machine myself, or buy it preassembled, it is my property. If it decides to walk away I would hope some kind soul would return it to me. If it begins to malfunction and hurt people I hope some kind soul would deactivate it in the safest, most expedient manner. I will do the same to any errant toasters I encounter.