The Torah is an all encompassing law structure. It all exists as one comprehensive set of instructions. Never is the Torah meant to be followed in part.
Thats a good point you make here. It means that no one, not even the jews are keeping the Mosaic law because its impossible to keep the law without a priesthood to administer it.
There is no temple, no priesthood, no way to make the atonement sacrifices and hence no way to fulfill the laws requirements.
Does it occur to anyone else that God has allowed the priesthood and temple to remain obsolete because he has removed the mosaic law as is stated in the Christian scriptures???
If he wanted people to follow it, then he would make it possible for people to follow it by supplying all the provisions as he did in the ancient past. No provisions, no priesthood, no temple... no requirement.