So you really can't explain why I should be grateful to people who have had, and have, nothing to do with salvation, except in a vague roundabout way, that frankly makes no sense. If you really understood like you think you do, then you could easily explain it clearly
Without the Jews there is no Jesus. Period. Now that that's settled let's get back to the topic. How to witness to the Jews. If you don't wish to do that, this isn't the thread for you.