One of the more interesting aspects explained that while "lying with another man" is an abomination, just a little while earlier in the book is says that eating pork is an abomination. Just like working on the sabbath and wearing wool and linen. All of these "offenses" are punishable by death, and I ask you, how many times have you worked on Sunday while chomping on a ham sandwich?
Since I'm not a Jew, I find none of that relevant (although I suppose it is mildly interesting). However, if I were a Jew and bound by those passages, I would point out a few things about your post:
1. No, not all of those are punishable by death. Some are, but others are not.
2. Regarding the "abomination" thing--what I do find interesting is that two different phrases are used in connection with different offenses. Regarding the "lying with another man," for example, the passage states that it is detestable. (or, in some translations, "an abomination") There is no qualifier. Regarding most of the other things you mentioned, the terminology is slightly different. It says, either with regard to some of the dietary laws, "it shall be unclean
to you," or with respect to others, "it shall be detestable
to you." It is interesting to me that to some things that qualifier is added. I could be wrong, but to me, that implies that these things are considered very different to God. If something is unqualifiedly detestable, it is something that God considers morally wrong as an absolute. With regard to those other things, I note first of all that they were rules given solely to the Jews, and were neither prohibited to anyone prior to the laws given to the Jewish nation or to Christians thereafter, nor does God ever pronounce judgment on gentile nations during the time of the Old Testament for not keeping those rules. So I think an accurate paraphase of the "detestable to you" phrase might be, "these things are not morally wrong in an absolute sense, but you are prohibited from doing them, so you are to treat them as if they were." That makes perfect sense to me given that some of those things were explicitly prohibited for Jews, but then later explicitly permitted for Christians (eating pork, for example; or failing to observe the sabbath).