As a rule, it's best not to ask a Jewish believer these sorts of questions since rarely do you get the same (or correct) answer. Jews are divided amongst Reformed, Orthodox, etc., just as in New Testament times where there were the Sadducees, who rejected the resurrection, and the Pharisees who affirmed it. In the Rabbanical writings, the Rabbis clearly speak of an afterlife, and not one invented by eeevil Christians:
"The spiritual afterlife is referred to in Hebrew as Olam Ha-Ba (oh-LAHM hah-BAH), the World to Come, although this term is also used to refer to the messianic age. The Olam Ha-Ba is another, higher state of being.
In the Mishnah, one rabbi says, "This world is like a lobby before the Olam Ha-Ba. Prepare yourself in the lobby so that you may enter the banquet hall." Similarly, the Talmud says, "This world is like the eve of Shabbat, and the Olam Ha-Ba is like Shabbat. He who prepares on the eve of Shabbat will have food to eat on Shabbat." We prepare ourselves for the Olam Ha-Ba through Torah study and good deeds.
The Talmud states that all Israel has a share in the Olam Ha-Ba. However, not all "shares" are equal. A particularly righteous person will have a greater share in the Olam Ha-Ba than the average person. In addition, a person can lose his share through wicked actions. There are many statements in the Talmud that a particular mitzvah will guarantee a person a place in the Olam Ha-Ba, or that a particular sin will lose a person's share in the Olam Ha-Ba, but these are generally regarded as hyperbole, excessive expressions of approval or disapproval."
http://www.jewfaq.org/olamhaba.htm
"The afterlife is a fundamental of Jewish belief. The creation of man testifies to the eternal life of the soul. The Torah says, “And the Almighty formed the man of dust from the ground, and He blew into his nostrils the SOUL of life†(Genesis 2:7). On this verse, the Zohar states that “one who blows, blows from within himself,†indicating that the soul is actually part of God’s essence. Since God’s essence is completely spiritual and non-physical, it is impossible that the soul should die. (The commentator Chizkuni says this why the verse calls it “soul of LIFE.â€)"
That’s what King Solomon meant when he wrote, “The dust will return to the ground as it was, and the spirit will return to God who gave it.†(Ecclesiastes 12:17)"
http://www.simpletoremember.com/articles/a/jewish-afterlife-beliefs/
You cut off the relevant half which explains the messianic age.
I am a Jew and the Judaism core is life > all throughout the TNK. When you form your religion around death as reward, it will fall among all the other false man made religions.
You cannot change HaShem’s Torah.