Yes, I was asking him that since his comment seemed to indicate it, but that would be highly unusual for a Christian. You response neither answered for him, or for yourself.
Nonsense. Which of the 613 commandments do you think can't be kept? People keep them all the time.
As for the laws regarding sacrifice in the Temple, Hosea pretty much taught us that when there is no temple, our prayers substitute for sacrifice. Have you ever wondered why Daniel prayed three times a day? It is because each of those prayers was one of the three daily sacrifices in the temple. Hosea 14:2 "so will we render as bullocks (sacrifices) the offering of our lips (prayers)."
I think you need to read what God said about the commandments, which is that they are easy to follow:
Deuteronomy 30
11 Now what I am commanding you today is not too difficult for you or beyond your reach. 12 It is not up in heaven, so that you have to ask, “Who will ascend into heaven to get it and proclaim it to us so we may obey it?” 13 Nor is it beyond the sea, so that you have to ask, “Who will cross the sea to get it and proclaim it to us so we may obey it?” 14 No, the word is very near you; it is in your mouth and in your heart so you may obey it.