1. Do Christians love Jews
My perspective on this is coming from being a Jew; however, I can say that within my experience, there are many Christians who accept and love Jews. Some of my best friends are Christian ministers, who even though we have theological differences, still see each other nearly as family.
At the same time, there are those Christians who dislike or even hate Jews. So there is no easy yes or no answer to this question.
2. Is the God in Judaism and Christianity the same?
Yes and no. The same basic concept of G-d is the same for both Judaism and Christianity. However, Christianity (or some branches) also accept a trinitarian view of God, which is not the same as the Jewish view. So while G-d is same for both religions, the perspective each has regarding G-d is different.
3. Will the Jews be saved after death , from a christian perspective
I can't say from a personal view point. However, this is a discussion I have gotten into with different Christian ministers, and in the more liberal churches, I would say that they accept that Jews will be saved after death. Now, this concept differs between Christianity and Judaism, and my own personal view often differs as well, but I do find it a decent step forward for many churches to accept that Jews are not destined to the Christian hell.
4. Why don´t the Jews believe in Jesus
As a Jew, I believe that Jesus was a Jewish teacher, who died a horrible death. However, he was not the Jewish messiah. I would be okay with calling him the Christian messiah, but that is a very different idea. The reason that he failed being the messiah is that he did not fulfill the messianic prophecies. That is why Jews do not accept Jesus as the messiah.
5. Who-when will the Messiah come for the Jews
Not all Jews are looking for a messiah. For those who are, it is not known who or when the messiah will come.
6. Why do the xians follow the OT when it is the book of another religion
Again, this is coming from a Jewish perspective; however, it is a perspective that has taught Christian history as well as courses on Christianity. The Hebrew Bible, or OT, is not a book of another religion according to Christians. It is the work in which their religion is founded upon. Since Christianity arose out of Judaism (with Jesus, the disciples, and Paul all being Jews), the Hebrew Bible was an important document in which their faith was founded on.