How do we know Jesus is the true Israel as described in Isaiah?

In Isaiah, the servant is uniquely identified with attributes that cannot be ascribed to the nation of Israel. For instance, Isaiah describes the servant as one who will not fail or be discouraged, which aligns with the perfect obedience and power that Jesus exhibited. Moreover, only Jesus fulfills the requirement of being stricken for His people, pointing to His sacrificial death on the cross. This consistent pattern of prophecy confirms that Jesus is not only the fulfillment of these Old Testament predictions but also the embodiment of the name 'Israel,' representing all who are united to Him by faith.