There is no general formula for converting
non-Muslims into Muslims. It varies with each case since each non-Muslim has
different concepts or objections in his or her understanding of Islam. So the
best thing is to begin by asking them about what they think about Islam and then
try to clear their doubts. Moreover, it is of paramount importance that instead
of showing an antagonistic behaviour towards them, Muslims should try to present
the teachings of Islam in a lucid and articulate manner. They should think of
ways and means to communicate the true message of Islam and refrain from
policing and threatening non-Muslims. Like true preachers, they should invest
their time in thinking of ways and means to earnestly call people to the truth.
Their preaching should have a humble tone, and they should deal very
affectionately and amicably with non-Muslims.
What you can also do is to ignite the flame for the quest
of truth found in every human being by urging people to be sincere and earnest
seekers of the truth. You can also draw their attention to the basic issues
which stare man in his face – perhaps the greatest of which is: ‘What will
happen when we die’.