Re: Goa - why?
pray how did portugal sprout in the middle of the indian subcontinent? 
an artificially annexed colony is all it was while under portuguese rule, and with the british leaving india, it was only a matter of time before it merged with the rest of india like various other tiny dutch, french and portuguese colonies along the indian coast.
indian government made several attempts at diplomatic talks with portugal but were always turned down unceremoniously. goans in goa and outside were frustrated at the indian goverments soft stand. the portuguese killed a bunch of peaceful protestors in 1955 and that sealed the fate of the last portuguese colony on indian soil.
the final invasion in 1961 was swift and met with hardly any resistance from the portguese forces. indian forces were cheered in by the locals.