Re: My MIL
People have done real research and written books on the art of human relationships . It is possible to make a friend out of most of the enimies.(not all though).
Are you not beiing too judementall and typecasting all MILs ? If we start with a pre-concieved notion that all MILs are evil and All DIS are idiots then there is no way to mend the fences.
Read a couple of relationship books for change written by realtionship experts. And do not tell me that books are useless. If you had not read a few you will not be here taking part in this discussion. 
I am not trying to flame you , insult you or downplay your POV , but there is alway a rational POV about things that is what I am trying to bring in the this debate. I hope you do not mind be being so blunt.