The group, predominantly Bangladeshi-Americans, came together over political unrest in Bangladesh.
Life in the small South-Asian country has been disrupted over the past several months, many blaming Jamaat-e-Islami militant political group.
The protesters outside of the United Nations are calling for a ban of the group that many view as a terrorist organization and one that has in recent days attacked minority Hindus in the country.
Source
Read more on the historical background to why these protesters are protesting :