now you say some laws are no longer enforced (dead), while others are impossible to keep, so you can't "live them". soooo, what's what and who's who? do you kill homosexuals, non virgins on their wedding night, parent cursers/abusers etc. or not? simple question, yes or no. god ACTIVELY ORDERED/COMMANDED to kill, or not let live certain people for certain reasons, he did not say "you may possibly, given the circumstances, if socially acceptable" stop making excuses. face up. do you obey god's commandments, or do you not? again, christians have an easy way out, you cats don't.
Let me see if I can give an example...
Among the things God commanded include animal offerings. Some to be brought up daily, some to be brought up yearly on certain holidays, etc... God also specified that offerings could only be brought up in the place of His choosing... which was the Tabernacle Moses built, and became the Temple Solomon built.
The Torah explicitly prohibits bringing offerings on private altars... so, not bringing up offerings today, since there is no Temple, doesn't amount to disobeying God's commandments.
Regarding the laws you point out, the fact is Torah laws that came with capital punishments had to be dealt with by the great sanhedrin in the Temple. Something that doesn't exist today.
You seem to be unaware of the extensive and complicated due process afforded to everybody according to Jewish law.
Back when execution COULD be carried out, it was rare to be able to actually put someone to death.
There are laws for women, laws for men, laws for priests, laws for kings, laws for farmers, laws for judges, laws that could only be enforced when the Temple in Jerusalem stood, laws to live by every day even without the Temple.. even without residing within the land of Israel.
And a person is expected to live according to what applies to him.