Pork-eating and circumcision

First of all, this is a serious question! Can anybody tell me why both Judaism and Islam ban the eating of pork and enforce male circumcision while the other great Abrahamic religion (Christianity) does not? Was there a time in history when these things applied in Christianity as well? Serious replies only, please!

Let me hear you say "Abra Ham"

PORK USED TO CARRY A WARM THAT GOT INTO HUMANS IF NOT COOKED WELL DONE TRICK A NOSES OR SOMETHING LIKE THAT.
ALSO JEWS AND ARABS HAD SUCH BIG DICKS THEY NEED TO BE SHORTENED.

OR THE GENTIALS JUST DID NOT WANT THEM EATING BAR B Q

ITS LIKE THE OLD JOKE A RABBI WHO DID A LOT OF CIRCUMCISIONS WANTED SOMETHING FOR HIS RETIREMENT. SO HE HAD SAVED THE SKINS HE TOOK THEM TO A LEATHERSMITH. HE TOLD THE LEATHERSMITH THAT HE WAS LOOKING FOR SOMETHING TO REMIND HIM OF HIS JOB. A MONTH LATER THE LEATHERSMITH BRINGS HIM A PAKAGE. THE RABBI OPENS IT SEES THAT IT IS A BILLFOLD. HE SAYS TO THE LEATHERSMITH THATS IT. THE LETHERSMITH SAYS RUB IT , IT BECOMES A SUITCASE.