i think you've got, or are in the process of getting, a better understanding
of how these factors interrelate. love is empowering to you, to what you
want to experience and to who you want to be... hate is a burden.
i'm looking at the situation(s) you've described with an eye towards cause
and effect; input and outcome. since i consider humans as "creator beings",
i believe that each is empowered to construct the reality that they experience.
for some reason(s) each person involved has created the circumstances
which each has lived through [the purpose is for learning]. i disbelieve that
the new husband had "caused" the breakup of your parents relationship...
he does not have the power to fracture a unified will... nor to overwhelm
the power of a singular will and impose his desires upon it. i see the breakup
as a consequence of the choices your parents have made (perhaps those
choices, or some of them, were made prior to incarnation! beyond their
present conscious awareness).
the thing for you to focus on presently is that peaceful feeling which came
to you. let thoughts of other things rest for a time and just expand that
sensation of peacefulness; attune yourself to it.