Sanatana-dharma or Hinduism is a universal process and applicable to everyone, then naturally anyone can practice the principles of it. Anyone can and should be allowed to participate in the process. Furthermore, anyone who is looking for the ultimate spiritual Truth is already one who is following the path of Sanatana-dharma. So you could say that anyone who is sincerely looking for such Truth with an open mind is already on the spiritual path, at least on some level, and is thus also a Hindu or Sanatana-dharmist, a follower of Sanatana-dharma.

The point is that there is one and only one God and one Absolute Truth. The very first of the Vedic books named the Rig-Veda proclaims, Ekam Sat, Viprah Bahudha Vadanti (There is only one truth, only men describe it in different ways). A person’s progress depends on how far he or she really wants to go in this lifetime, and how they approach various levels of knowledge to understand the Absolute Truth.

So those who may be accepted as followers of the Vedic tradition generally accept the following: A) The Vedic literature presents knowledge of the Absolute Truth and is the authority on the Vedic tradition; B) There are various ways to realize different aspects of this spiritual Truth; C) God can appear in different forms; D) We are given more than one life on this road of Self-Realization; E) That ultimately we are responsible for accepting the path we take and the progress we make.

To clarify this last statement, even if you accept the path of Sanatana-dharma and believe that God will save you –Vedas also say that faith alone is not enough, you must show your faith by your deeds / karma, and your deeds / karma will show the true state of your desires and consciousness.