Prince Abbas,
If this is a question you want me to respnd to, please clarify who you are referring to.
I don't understand why you are putting conditions in order to reply to a question regarding basic principles.
God sends His prophet to guide people, and people reject him, call him liar, and stick to what their elders had been doing. So what should we say about such people?
A person who calls him liar is the person who has rejected God's command. Such a person should not be termed a blessed person. Quran condemns such people in its several verses. For example people like Yahood and Nasara who rejected the True Prophet of Islam.
This is not a tricky question. A simple question based on principles, not on personalities.