Who can judge someone’s quality and degree of faith?

Partai Keadilan Sejahtera (PKS ) has objection and strongly opposses the vice president candidacy of Boediono by Partai Demokrat. The reason is that Boediono does not represent Islam and his faith in Islam is not to the satisfaction level of PKS. It strange, what kind of Islam does have to represented more? All president and vice ppresident candidate are all Islam in their religion. They do all Islamic religion in prayer. Nobody can measure the faith of somebody. That is not the territory of human. That is the territory of Allah.