Verse 15 says that anybody who eats an animal that dies of itself will be unclean until the evening. Nobody gets stoned to death. The only requirement is to have bath and change clothes.
It does not say anybody. Non Jews were not under the law and not required to ceremonially wash.
Don't waste my time with cofty's nonsesical comentary. I don't have time to read your dribbling long commentary of scripture as cofty sees it.
Lev 15 If anyone, whether a native or a foreigner, eats an animal found dead or one torn by a wild animal, he must then wash his garments and bathe in water and be unclean until the evening; then he will be clean.
No permission stated only restoration.
When you can show that God allowed to eat dead animals, prove it with scripture. Lev 17:15 shows a distinction between the blood of a slaughtered animal ( for food)and one found dead. It was not permission for Israel to go around eating dead animals with impunity as your falsified OP states.