"Moses was faithful as a servant in all God's house, testifying to what would be said in the future. But Christ is faithful as a son over God's house." -Heb. 3:5
When the Israelites rejected the words of Moses, God held them to account as if they had not rejected Moses, but the LORD Himself. This occurred at Taberah, Kibroth Hattavah, Kadesh etc... where God confirmed the prophetic authority by slaying his own people by means of venemous snakes, fire, plagues or endless wandering. You reject Moses, you reject God. The same was said of Joshua, the judges of the LORD, Samuel, the anointed and faithful kings, and the later prophets.
Does it not logically follow that the Jews, who for 2,000 years have rejected and denied the gospel of Jesus Christ, who is greater than any prophet or king (much greater than Moses himself) should not have their own way of salvation....since they have turned away from God incarnate? This is the testimony of Hebrews as per ch.10:226-31. May God make us faithful to Him!