Why do Muslims Believe that Muhammad was a Messenger of God?
The final messenger sent to mankind was a man born in Makkah named Muhammad ibn ‘Abdillaah (may Allah raise his rank and grant him peace). Although many Westerners generally accept that the likes of Abraham, Moses and Jesus were prophets of God, they have trouble accepting that Muhammad (may Allah raise his rank and grant him peace) was a prophet of God too. This has very much to do with the fact that their ancestors did not accept the message of the final prophet, and consequently, they do not regard him as being a prophet of God either.
One of the problems with those who claim to be adherents of freedom and liberalism is that they are often not very open to reconsidering certain conclusions they might have already drawn. The claim to being liberalist necessitates that an individual be open minded and ready to change any preconceived notions once convincing proof is provided to substantiate something new or different. People who claim to be open and liberal often become very sensitive and intolerant when valid criticism of their beliefs is made. Refusing to consider something before it is even brought forward is a sign of insularity, not liberalism.