Oh, about Matthew, I think Jesus was speaking to the "multitudes". Jews and Gentiles alike. Also, the Jews were God's chosen people there for a time, and enjoyed many special blessings and light because of it. Yes, there were some things that don't apply now, but those are pretty clear, like sacrifices pointing to Christ 'sacrificing' His life, so I just like to glean all I can. And of course, now we all have a chance to be part of God's 'special people'.