Interrogation
            Some Muslims today have gotten into the  habit of interrogating their brothers and sisters about matters of faith and  law. They ask them questions about the particulars of the Islam creed or some  details of various legal ruling, but their intention is not to learn anything.  They already know the answers. What they want to do is see if the person they  are asking is on the right creed or has adopted the correct position in certain  matters of Islamic Law – or have the correct "Islamic" attitude about  certain issues. 
            A classic example of this is to ask  "Where is Allah." Yes, the Prophet (peace be upon him) did once ask a  slave girl this question. However, the people who go around with this question  on their lips, foisting it on every passer-by, forget that the Prophet (peace  be upon him) in that instance had a specific reason for doing so. He was trying  to ascertain what her religion was, because her owner was thinking about giving  her her freedom if she proved to be a Muslim. 
            Interrogating people about doctrinal  matters is a bad habit that Muslims should abandon. Allah has not commanded us  to cross-examine each other's faith. Moreover, such behavior can bring about  many bad consequences. 
            For instance, when a person on the street  is asked a question about some Islamic issue, whether it be a tenet of faith or  a point of law, it may very well be the case that the person does not know the  answer. Indeed, it may be that the person has never thought about the question  before. Nevertheless, people are usually shy to admit they do not know  something. There is a good chance that the person being asked will simply make  something up on the spot and say something that is wrong. 
            Is it, then, right for us to pronounce  judgment on this unsuspecting person – to brand him or her as a deviant or a  sinner? 
            Allah has not appointed us to be judges  over the people. We are merely required to deal with people as they present  themselves to us. What is in their hearts is between them and their Lord. 
            As Muslims, we are supposed to assume the  best about others. We are not supposed to harbor suspicions in our hearts. We  are not supposed to snoop around for people's faults. 
            We should never try to get our fellow  Muslims to fall into some error so we can "catch them out". We should  rather assume the best about them and leave their inward thought to themselves  – and to Allah's judgment. 
            What we can and should do is to teach  people – without first cross-examining what they might already believe. We  should give sensible advice to people, guide them to what is right, and do the  best we can to be a positive influence in their lives. We should strive to  disseminate goodness, ward off evil, and be a source of right guidance. When we  conduct ourselves in this manner, we do good for our own souls as well as for  others. 
            Source:
            "Cross-Examining Others about Matters of Faith" - Muhammad Ahmad Abd al-Rahmân