Killing the First Born Sons

There is so much speculation as to why an all loving god would kill the first born of all the people in the land.  Unless you are familiar with my work, none of it makes sense.  Why the hell would a god kill the first born of the cattle out in the fields?  What kind of sick god kills people and cows for pleasure?  You are about to find out why he cared about cattle and why the first born sons were killed.  First born sons have been killed many times in history and the lord ordered it to happen every time.