You can allegorize Revelation, dismiss Romans 11:25, ignore the Lord’s promise to a teenage girl that her Son would sit on the “throne of David” (where’s that supposed to be, Salt Lake?), and for that matter dismiss the entire OT.
Israel is back in the land. That’s a miracle. More to come, film at 11.
No Christians that I know of dismiss the Old Testament.
The problem for Christian Zionists/dispensationalists, however, is that they have myopia when it comes to Bible study — they cherry pick verses in the Bible and apparently dismiss others (forgetting that Scripture never contradicts Scripture). I believe you just gave a good example of that — interpreting Romans 11:25 in a way that makes it contradict Romans 9.
I think if you would pray for understanding and read Scripture in light of Scripture, then you would realize that the modern state of Israel is not a fulfillment of Bible prophecy.