The answer to your rumination can not be answered on this board. Simply put: Jesus offered mankind a way to eternal life. Follow His teachings and you will get there. There are thousands of books - starting with the Bible - that cover this topic and His teachings. Priests study the topic for years. You can't find the answer here.

But BTW, the rewards on earth are not material. The reward in this life is your own inner peace. Jesus doesn't control the free will of people who make bombs, guns and have the desires to kill other human beings.