Why only one waifu,when you could get entire harem ?Russian Orthodoxy's last desperate attempt to make itself relevent.
The triumph of hedonism (anime waifus) over religion is final.
And considering that orthodox church did nothing in stopping abortion,i do not think that they care about anybody soull.
Rather,considering that Russia is ruled by KGB mafias nad mafias control prostitution,they fear that anime would lead to Japan-like-situation when healthy men instead of hiring russian prostitute would buy game with 2D girls.
According to what i read,more then 30% of japaneese man did so.