@NourUgaas
Kush empire folk were definitely close to Cushites rather than to Dinkas. So I don't get the whining of being confused with the Kush empire.
Meroitic was probably a Cushitic language.
Meinhof, Zhylarz and Kirsty Rowan were pushing very hard for Meroitic to be officially classified as a Cushitic language. The only obstacle was Griffith, as he prematurely classified it as Nilo Saharan.
Officially it is unclassified, the reality which is very much viable is that we can tentatively relate Meroitic to Cushitic. However we have to be careful because during this time, the migrations of Nilo Saharan speakers to the predominantly Cushitic Lower Nubia/Upper Egypt region already began. Thus Meroitic has a semblance of resemblance to both Cushitic and Nilo Saharan due to these reasons and because it was a primitive language, further studies weren't done. One thing is for sure, just like you said, racially they were absolutely Cushitic and not those blue black Nilotes.