This is the base of Islam - oneness of the Almighty Allah (swt). So there has to be only one scripture, the word of Allah (swt). It is not a worldly theory kind of thing that if one doesn't find logic go for other. Don't blame it on Quran or sayings of prophet(pbuh) when you haven't gone through them. Quran says the truth and is very logical, but only if ye knew! Truly tell me how many so called Hindus have gone through the Veds, purans, Gita, Ramayana...etc etc to fall back upon? You know about the Ramayana or Mahabharat as its shown on TV...isn't it?
As far as the issue of 'forceful' conversion is considered I let the Quran explain the truth:
'Let there be no compulsion in religion: Truth stands out clear from error' [Al-Qur%u2019an 2:256]
'Invite (all) to the way of thy Lord with wisdom and beautiful preaching; and argue with them in ways that are best and most gracious.' [Al-Qur%u2019an 16:125]
