It's challenging, isn't it? But I don't think that's an excuse to ignore the challenge.
Religions that are part of ethnicity aren't something you can pick off a menu of religions as an adult, that comment shows you don't understand the issue, it's not about religious practice.
One of my concerns is that it places a barrier to relationships with birth family later on, that growing up with a different lens gives. I also worry about them feeling fully part of the community when older. It's sort of usual adoption issues, but a different, additional angle.
I'm not saying there should only be ethically matched adoption. I'm saying that it's a factor that should be considered, and not downplayed, and certainly not diluted to "the colour matches, job's good!" Obviously, a match needs to be looked at in the round, with all factors considered, and no match will be perfect, but may be best for that child at that time.
I just don't think ignoring the issues, thinking "it can't be perfect, therefore we don't need to think about it at all", saying "I disagree, and I'm right!", or thinking that because you as a parent have grown up in an ethnic majority group in your culture, you know what it's like to grow up as a minority group, etc stops there being issues.
Identity is complex, adoption and identity is complex, but it does everyone a disservice to pretend that means ignore it.