Women Priests

If a woman tries to become ordained she can be excommunicated.  Way harsh.  Are not there much more grave things that someone could do for excommunication?  Murder, rape, embezzlement, stealing, beating up your spouse time and again, but yet no excommunication.  Even a priest who messes with boys is not excommunicated.  There are penalties for all this but not excommunication.  If a woman has an abortion she can be excommunicated.  Abortion is not a good thing, but why excommunication?  If it is murder, then why does the one who murdered the policeman not get excommunicated?  Yet, if it were not for women, my church would crumble.  Bishops?  Please.  On the day to day, the hierarchy are not up to making things happen.