There is no Genocide (I repeat no Genocide, whether deliberate or accidental) going on in Bangladesh on Hindus. You obviously have not ever been to Bangladesh. Otherwise you would not say this.
A Bengali person of some education and class will usually not have the same type of communal mentality commonly seen often in Northern and Western parts of India much less form hate organizations like the Shiv Sena or Bajrang Dal.
Bangladeshis treat their fellow Hindu and Christian brothers/sisters with as much or more respect as they do to their co-religionists. JanMashtami, Durga Puja, Christmas and Easter is celebrated with as much fervor in Bangladesh as is Eid. These are all national holidays. There are at least two Hindu ministers in Sheikh Hasina's govt. who are long time political activists. Dhakeshwari Temple is the National Temple of Bangladesh as declared by the Govt. Nobody taught me when I was growing up that just because I was a good Muslim I needed to hate on Hindus. Things are different in India for some I guess.
The events about communal hatred in Bangladesh you hear are mostly propaganda. There may be lone incidents of hatred which is common in third world countries but very few pre-meditated ones. According to Government and many civil society leaders about religious hatred events as reported in the media - violence against religious minorities (including Hindus) normally have had political or economic motivations and could not be attributed only to religion. In other words - assholes were involved. There are assholes in India too. Witness the killings of missionaries and desecration of Mosques etc. At some point there are tit-for-tat violence incidents because events like Babri Mosque demolition happen.
But thankfully in Bangladesh no one is so detached from reality and looney tunes as to buy copies of Mein Kampf and start a club and a grand plan of unleashing oppression on Hindus.
I don't need to tell you anything about Bangladeshi public life (which is as modern a country if not more than India) but since you know nothing about it - please don't try to paint a nation of some sixteen crore as a den of Jihadis.
Try the Internet. Use Google. You don't even have to read. Click 'images' on Google and you can just look at pictures.