Re: that point, I wouldn't want to speak for ultra-Orthodox Jews but the vast majority of Hasidic sects say pretty explicitly that the laws of Moses only apply to Jews...just like the vast majority of Christians believe they don't. (Excepting, like, Seventh Day Adventists on the Christian front.)
Judaism is not a universalizing religion and the laws of the Torah are the Israelites' contract with their God, not a commandment from God to all of humanity. This is pretty basic theology. Christians literally since St. Paul invented the religion argued that Christians who aren't Jewish (now all Christians) aren't part of that covenant and aren't subject to the laws of Moses. Jews tend to agree that their religious laws are theirs alone and not universal. It's super weird when people sneer at Christians all "ha ha you eat pork and aren't circumcised" when "you can eat pork and not be circumcised" has been Christian doctrine for 1950 years.
This is the central conflict of Acts of the Apostles, no less.