What did Jesus mean by saying He was hated without a cause?

When Jesus claimed to be hated 'without a cause' in John 15:25, He meant that the animosity directed towards Him did not arise from any fault or wrongdoing on His part but rather from His honest declarations about the nature of sin and the wickedness of religious hypocrisy. He identified the religious leaders' reliance on their traditions and works rather than God's grace as fundamentally flawed. His statements threatened their power and exposed their true nature, inciting hatred instead of acceptance. The implication is that the Gospel of grace, which He preached, continuously challenges the self-righteousness prevalent in religious circles, leading to conflict for those who embrace it.