I’ve been to a few Bengali weddings and none of them have served fish there, that’s pretty bizarre and also never come across the no cutlery and washing hands with jug thing.. They sound pretty backward but then again u get some Indians and Pakistanis like that as well who act just like they do ‘back home.’
The no photos, no dancing thing is prob just that they were really conservative, most Bengalis in the UK (I think 90%) are Sylheti who tend to be quite old-fashioned and strict, much more so than the actual ‘real’ majority of Bengalis in Bangladesh lol for example I was there just recently and I literally saw only one woman in a burqa in Dhaka and just a handful wearing hijab the 10days I was there yet amongst Bengalis in the UK soooooo many of them wear it.