Trust me, you need way more study. The “end of the Jewish age” will be at the end of the millenium. Read Romans 11 carefully. The Jews will be saved through Christ, but they get a pass until the end of the Gentile age.
The Jewish culture is here to educate us to the understanding of the Lord’s four appointed times.
Yes, the Jews will be saved through Jesus Christ. However, you need to read the Mt. Olivet discourse thoroughly. Note that the Greek does not refer to the end of the world, but rather to the end of the age (aeion). Here's a good chunk of R.C. Sproul's book on the subject. Here's a good review of his book.