Islam is the religion which is well connected with other religions such as Judaism and Christianity.. It's must n should in Islam to believe in Moses(the prophet of Jews) and Jesus(the prophet of Christianity) and also other prophets sent by the Almighty God.. If a Muslim deny to accept Jesus and Moses as a prophet from God then he is not considered as a Muslim.. It's one of the basic belief of Islam that they are the one of the most important prophet sent by God like other prophets i.e Noah,Abraham,Jacob,Joseph,John.etc (Peace Be Upon Them)