If we are not sure what is in a person's heart... press in to God to protect you. Don't attack the person because what you may find out is you misidentified something based on something that has not been healed on the inside of you.
Psalm 51:10 (KJV)
10 Create in me a clean heart, O God; and renew a right spirit within me.
Always know that God will never allow you to be put to shame as it is written in Romans 10:11. Trust God to expose what is not right, but be prepared when what he exposes is something that is not right with our hearts. For it is written, before I can remove the speck out of my brother or sister's eye... I must first remove the plank from my eye to see clearly (Matthew 7:5). Many folks have been operating with unresolved issues that God is trying to make whole... but many are covering up with the word of God on the outside but the word of God has not penetrated the heart yet (Hebrews 4:12). When the word of God penetrates the heart... there will be no need to cover anything up. We will be made whole as we now can see clearly (Ephesians 6:10-17). Until that happens, principalities will manipulate how you see things because you have not forgiven yourself which makes it hard to forgive others (Matthew 6:14). This is why many are easily offended and are always looking for the speck in thy neighbors eye... pointing out that speck but never seeing the plank in their own eye. They have a form of Godliness but never really coming to the truth which will make them whole (2 Timothy 3:2-7).