Can't we follow any religion we please?

There are many people who follow the teachings of a religion as best they can and others who believe in God in some way without practicing any formal religion.[ Anyone to whom God's message was not adequately conveyed yet believed in Him and tried to worship Him with sincere intention will be judged by God according to what is in his heart and mind, for He is the ultimate judge of all affairs. The Qur'an states that God never punishes a people until after He has sent them a messenger with the clear order to worship their Creator alone without any associates. It also states that He does not punish for what people are unable to know or what is beyond their capability] Many have abandoned the thought that there could be any true religion because nearly all religions claim to be true. And some allow that all religions are legitimate paths to God and are acceptable to Him. So how is Islam different from other religions? Islam has several unique features which can be confirmed through deeper study: 1.Islam is the only religion whose sources have remained free of human alteration and interference. 2.Its divinely revealed scripture is in harmony with established facts of science, clearly bearing the signature of the Creator of this universe. 3.Islam provides answers to the essential fundamental questions which occur to the mind of every intelligent person, those related to the purpose of creation and life, and concerning a further existence after death. 4.Islam is the only religion which insists upon worship of the Creator alone and completely rejects the worship of any aspect of creation. 5.Islam dispenses with all intermediaries between man and God and allows every individual to contact Him directly, thus eliminating religious hierarchies and other sources of exploitation which have characterized the history of religions throughout the ages. In Islam no cleric or establishment can come between a person and his Creator.