Saleeen you are right I have also not seen or heard of such people. But illegal migration is a trend only among the people those who have relatives in India but opposite is also true. My nana had to migrate to bangladesh along with his cousins from kolkata in 1947 as some radical hindus tried to kill all of them and n he had to hide in a jungle for 17 days. But how ever every cousin left behind 1 or 2 of their siblings in kolkata. After coming to bangladesh every one of my grand father become successful and become judge of supre court to income tax commissionaire to member of jute board etc. But all the relatives in kolkata are dirt poor now. Ask money during every occasion. They have requested to settle them in Dhaka couple of times and always ponder why their grand father or father did not come to Bangladesh.
But the bottom line is that even if migration happen it happen among such people those who have relatives and known people but the number is not that high.
From my own family experience I know any hindu can easily fled to India and they can get shelter there even if they go there after committing a crime and those who migrate are treacherous in nature. During 1971 in our home town my grand father helped a hindu by buying a market from him after using almost all of his savings when he was planning to fled to India only based on trust without any paper work as he said he will never return. But that treacherous hindu after the liberation war some how sell the market again to another hindu by doing all the paper work and thats why then my grand father had to give up the market after a legal battle... my grand father was a victim of trusting a hindu migrant.
Same case also apply in the case of my aunt when he married a hindu converted muslim man. That bastared for money killed my aunt along with her daughter and fled to India. As my aunt was an government official so even interpol was called to identify that hindu but he got a safe heaven in India.
Before this bhartis talk about illegal migration they should look at their own as@s. How this bhartis are sheltering even criminal and treacherous hindus. Bangladesh government should not take back this treacherous hindus and should give capital punishment to the people who fled to India after committing crime.
Even though apart from that there are some good hindus also in Bangladesh. But I have seen those who are well established hindu in bangladesh they lead the treacherous hindu list. Some hindu officials those who are colleague of my dad...has rumor that they have bought certain property in kolkata as they will go to India after retirement for settlement.
I really think your reasons are legit and well justified but such hatred never brings anything good. Not to mention, there are cheats and scums in almost every part of the world, especially because of extreme poverty on that side(indo bangla border) of the world. I don't think religion has much to do with the things you have encountered, but people just looking out for their self interest and the perfect victim who was in need. That is perhaps the problem we have now: India looking for its own selfish reasons, and a govt of bangladesh showing more than a willing. I really don't think you should generalise anyone based on their religion or origin.