Why is it dangerous to speak against the church or its members?

The sermon illustrates that to speak against the Bride of Christ, which encompasses all believers, is to directly offend Christ. Just as God reacted strongly against Miriam and Aaron for speaking against Moses, He will not tolerate disrespect toward His church today. 1 John 4:20 emphasizes that if someone claims to love God while harboring hatred for a brother, they are in darkness. Such attitudes can demonstrate a rebellion against God and jeopardize one's spiritual state, reinforcing the necessity for love and unity among believers.