"In a nutshell"

‘Religion’ or ‘Faith’ basically is conceptualized by the ‘wise’ to bring in order, cohesion and peace in human habitations at the very beginning of evolution of civilization. 

End of the ‘man-eats-man’ phase and protection to the weak and the infirm (order); Tolerance, equality, bonding among people belonging to the particular faith (cohesion); Interaction, affinity, brotherhood, harmonious co-existence - all of which, culminating in the physical and psychological well-being (peace) – are all the fruits of introduction of religion in this universe.

Peace is the quintessential prerequisite for proper channelization of thought processes concerning all areas of human endeavor, aimed at advancement in humanities, arts, sciences and spirituality.

Great minds realized the futility of anything destructive (negativity); and the worth of everything constructive (positivity). 

Accordingly, they showed different ways and means to nurture and sustain positivity among humans through religious tenets. 

When endowed with fertile minds, diversity in thought is but natural. This caused the birth and propagation of different religions through the agency of great souls at different times in human history. 

There can always be new religions evolving so long as human race exists in this universe. 

Incidentally, no religion ignores the nature with all its creatures, without a proper balance of which, humans can’t survive for long on this planet. 

‘Spiritualism’ is innate to religion.

But then, certain thinkers, by virtue of their inherent knowledge and in their own innovative ways, went beyond religion in pursuit of self-realization. 

Hence, ‘spiritualism’ could be both inclusive and independent of religion.

Now-a-days ‘Hinduism’ is known as one another religion. 

People including those born as Hindus, are ignorant of what came to be known as Hinduism in fact, is ‘Hindu Dharma’ or ‘Sanatana Dharma’ - a way of life, and not a religion as has been contrived by the British and acknowledged by the rest. 

The fact of course, stands out that as with the times, ‘Hindu Dharma’ lost much of its sanctity, though not in totality. 

Though not adhering to their own religious principles in any great measure, people are getting more and more intolerant of other religious groups - a great irony. 

Religious intolerance is indicative of lack of reverence to own religious principles, which is not realized as such, by any! 

What all religious alienation we witness today, is sparked by ignorant fanatics and further fueled and bolstered by political leaders for their own selfish ends.

No sane person whichever religion he is aligned to, would harbor negative thoughts against another religion!