For all the debate going on about Buddha's birthplace, its surprising that only a few sources scientifically claim Buddha to be born in India. I searched a bit and found a possible reason for this confusion:
(a) Some researchers claim that Buddha was born in a village named Kapileshwor in Orissa, India based on an Ashoka inscription. However scientists have not given academic credence to their claims and agree that Buddha was born in Lumbini, based on the originality of Ashoka's pillar. For details, please go to this
link. Another factual site is
here.
(b) There are other people who agree that Buddha was born in Lumbini, but that, the name Nepal did not exist then. But by the same logic it can also be said that India did not exist then. And by the same logic, Dehradoon, Simraungadh, Sikkim and Darjeeling are in Nepal, which sounds really absurd to me. And if this sounds absurd, then to say that Lumbini is not Nepal sounds equally absurd.
I think we should compile a list of all the sources, online and offline that misinform the public that Buddha was born in India. Normally I try to ignore discussions in bulletin boards (except one that I found comments hilarious, #6). Here are a few links accessible online:
1.
http://www.aboutbuddha.org (Northern India)
2.
http://orias.berkeley.edu(Indian-Nepalese border)
3.
http://www.hinduonnet.com (Kapileshwar, a village in Bhubaneswor, India)
4.
http://www.mortensvenningsen.com (Nepal did no exist then)
5.
http://www.buddhistchannel.tv (Orissa)
6.
http://movies.dcealumni.com(Siddhartha is a Sanskrit name, not spoken in Kapilvastu at that time)
7.
http://www.indiamike.com (Orissa)
8.
http://www.urbandharma.org (borders of Nepal)
9.
http://www.buddhamind.info (northern India -- modern day Nepal)
10.
http://kadampa.org/ (northern India -- currently Nepal)