sandeep who told hindi is the mother tongue of all indians , go back to grade 1 and 2 and study again its only the official national langueage of india not the mother tongue of all the indians ,well i think we indians need to travel within india more so that we will understand india more , those who all wonder why keralites in gulf please read histroy , arab merchants were dealing with ports in kerala for past 3000 years or more , all the famous spices in the world ginger , pepper, cardamom , etc etc use to be bought from kerala ports by arabian merchants and sold to different parts of the world , then once the british invaded india the spices industry in kerala was in peril and poverty started to build up ,after indepence the lad reforms came which completely destroyed farming , so people naturally had a knowledge of out side world started moving out of inida in search of oppurtunities and reached the gulf peneinsula by the early 1950,s and 1960,s. you can see another example is sindhis from the gujarat coast who are spread around the world because of similar reasons.