Should I encourage my friends to adopt or not?

Im close friends with a couple who I've known for years. They are a little older than me and are both in their mid 20s

Their both amazingly kind people and are extremely charitable to those who need it most. They actually don't have any children as for now but they have always really wanted to adopt as a lot of their family members are also adopted and they see it as a really special thing to do.

The male partners dad was adopted and his uncle also has two adopted daughters on his mums side and his sister has recently adopted a little boy from Spain a couple years ago.

They are both aware of the realities of adoption and i know they would make great parents. They are so fun to be around and are both really caring, kind people.

The only thing is they have been looking for a while now and they really have their hearts set on this little girl originally from North Korea but is now in care in South Korea. They said they really wanted to take a child from a under privileged background and be able to change their life for the better and give them opportunities they could never imagine in there current situation. What they said really warmed my heart especially as im also adopted. This is why they came to me for advice as im a none family member and wouldn't have a biases opinion on them and they also want me as a reference too.

The only thing is they aren't exactly politely correct. They are definitely not racist, they just have no filter and it's what makes them so funny as they just don't care what people think as long as their not hurting anyone. For example I've heard them use words like chink and seen them do the Asian eye thing before. It's definitely not in malicious way. Every race makes fun of each other time to time.
Updates
+1 y
some girl asked why they wanted to adopt a Asian baby with a disgusted face on her and my friends joked and said "because very one knows Asian babies are the cutest and the social worker told us she'd throw in some prawn crackers too" this was clearly a joke towards this girls ignorance not towards the little girl they want to adopt. This girl then called them out and said she thinks it's wrong for a white couple to adopt a Asian child as she will know nothing of her culture.
Updates
+1 y
They were both really hurt by what this girl said and asked her if she didn't support them to not bother talking to them again and it did also start to make me rethink things. I worry they may say some jokes to this little girl if they adopted her about her culture and she'll end up not taking her roots seriously and see them as a joke.
Should I encourage my friends to adopt or not?
Post Opinion