All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His slave and Messenger.
The religion of Islam is the true religion and Allaah does not accept any religion other than Islam from anyone; for more benefit, please refer to Fataawa (plural of Fatwa) 88906 and 88051.
Therefore, if you convert to Hinduism or Zoroastrianism or to any other religion, you apostate from Islam. If you do so, you lose this life and the Hereafter. The danger is not in people knowing this about you, but rather the great danger is that Allaah is aware of all that you do. What benefit would you gain if the Hindu people welcome you but you become deprived from the Mercy of Allaah?
For more benefit on apostasy, please refer to Fatwa 85488.
As regards how the west views Islam, then this does not affect the reality that Islam is the true religion, and does not affect the reality that a Muslim must remain steadfast on it.
A Muslim has a good example in the Prophet and his companions . The enmity against Islam and Muslims which they faced from the tribe of Quraysh did not lead them to leave their religion; rather they remained patient and steadfast and they won the good of this world and that of the Hereafter.
Even though the west has a negative view on Islam and the Muslims, some of them have a positive view about it. Rather, many of them embraced Islam or tried to read and learn about it.
Allaah Knows best.