How far do you take "the blood is thicker than the mud" in backing family members?

How far would you go to have a family member’s back? I have family who believe you should stand behind the family right or wrong no matter what. If a brother, cousin was in the wrong would you take their side just because you share familiar DNA or blood line? Would you love them just the same but if they are wrong not support it? If said family members tried to guilt you into backing their play do you cave in a follow the majority or stick to your guns and go by what was correct in the situation even if it was against family members?