Well , tbh only muslims can judge if its racist or not i think if you are not muslim and someone harrass islam you probably won't care , im muslim and saying allahu akbar is not racist for me , but changing or modifing it will make it racist and cost lots of problems , like someone changing his name to ALLAHU SWAGBAR or whatever i made an f1 about it and the admin said i'll make him change his name , and fortunately he did make him change his name .
TL;DR : if you are mature saying it , it shoud never be racist

Well , tbh only muslims can judge if its racist or not i think if you are not muslim and someone harrass islam you probably won't care , im muslim and saying allahu akbar is not racist for me , but changing or modifing it will make it racist and cost lots of problems , like someone changing his name to ALLAHU SWAGBAR or whatever i made an f1 about it and the admin said i'll make him change his name , and fortunately he did make him change his name . TL;DR : if you are mature saying it , it shoud never be racist