Imagine seeing a blue woman, like one of those Avatar characters, in your local park.

Holy fuck the bigotry of soft expectations. Yeah dude, these brown people probably didn't ven know what a white woman was prior to this encounter. To them, this white human was probably like an alien. Their small brain probably didn't know how to approach such a being.

It is 100% guaranteed 100% of these people know the name of at least one Hollywood actor, let alone "never seen a white person before".

What this is, most likely, from my experience, is workers on a beach not sure how to react to somebody "inappropriately sunbathing" at a place you probably aren't suposed to sunbath. They probably want to tell her to get up and go, but they don't know how to or want to approach. Also, it is most likely herd mentality happening here, as more people amass, more people gather around to ask what is going on, and they all look at this weird tourist looking sexy on the beach, wondering what the hell her problem is and why she is sunbathing there.

What it definitely isn't, is a bunch of incels gazing at an alien white human, as if they don't know what white humans are. This is Bangladesh even, which isn't some alien place. You aren't talking about a remote Caribbean island, you are talking about a country that has a lot of dealings with Britain. They most definitely know what white people are, they just don't know what to make of this person and they just stand there looking dumb, looking at a good looking person sunbathing where they shouldn't