If parents don't accept - and the guy is waiting on parents approval - then you must run and hide ASAP. Never ever show your face again to them.
If the guy does not care for parents approval, then you better believe he wants to make this work.
well if the guy proposes you then it is obvious that he wants to be with you and want to make it work.
if he doesn't care about his parents approval then not only girls should except any positive thing from the to-be-inlaws but also how can one say that guys behaviour wont be any less different with his wife as well? who dont care what she think.
do girls really want to be a part of the family, where their son (i mean the guy) already made a load of mess? where the guy disrespected everything in every possible way to get dream girl? do girls even bother to ask how is he handling the situation?