Then you are not talking of Hinduism, you are talking of mindset of Hindus in particular period. I agree religion evolves as people adapts according to current reality.
For a Hindu at one time, going out of the country via sea was considered as a sin, but today even a devote Hindu goes to any part of the world because of his work.
So agains I say secularism in in Hinduism, but all it depends, like you said, Hindus take their religion as. At given moment of time and place.
Let me correct you.....only the Brahmins were advised not crossing the seas do to reasons I have detailed in my earlier post. It was open to other casts.
Rig Vedic references to early seafarers - The oldest evidence on record is supplied by the Rig Veda, which contains several references to sea voyages undertaken for commercial purposes.
One passage (I. 25.7) represents Varuna having a full knowledge of the sea routes, and another (I. 56.2) speaks of merchants, under the influence of greed, sending ships to foreign countries.
A third passage (I. 56.2) mentions merchants whose field of activity known no bounds, who go everywhere in pursuit of gain, and frequent every part of the sea.
The fourth passage (VII. 88.3 and 4) alludes to a voyage undertaken by Vasishtha and Varuna in a ship skillfully fitted out, and their "undulating happily in the prosperous swing."
The fifth, which is the most interesting passage (I. 116. 3), mentions a naval expedition on which Tugra the Rishi king sent his son Bhujyu against some of his enemies in the distant islands; Bhujyu, however, is ship wrecked by a storm, with all his followers, on the ocean, "where there is no support, no rest for the foot or the hand," from which he is rescued by the twin brethren, the Asvins, in their hundred-oared galley.