Really the "European" Jesus you're referring to, and likely the one that BLM is referring to is the type we often see in the Catholic, and Protestant churches. I say that because in a lot of cases Christ is made to look a bit more European in those cases than in Orthodox iconography, and those cases are far more prevalent in the US. I have yet to see a European Jesus in Orthodox iconography. Maybe Russian icons, but I still don't see this as somehow racist.
That said I think anyone who's mentioned anything aside from a Middle Eastern Jesus is missing the mark entirely. Christ isn't, and will never be of African descent. He is, and will always be from an area of the world that looks different than someone who is African, or European, and more similar to someone who is Jewish, or Palestinian.
My last point though is that we were ALL created in God's image. (Genesis 1:26), and Christ died for us ALL on the life-giving cross to include people, and genders of ALL types. I really wish whoever has a problem with this would let it go because Christ isn't exclusively for any one "type/color" of people. This seems out of place when the issue of race comes up as I know many black people who pray fervently to Christ regardless of how he's portrayed here, or there. Hopefully then this isn't an attack on icons, or Christianity as a whole.