The nations are all people of God
Acts 15vs15
Acts 15:17
[17]And so all the rest of the human race will come to me, all the Gentiles whom I have called to be my own.

Salvation is not only for Jews but also for gentiles The priesthood have being changed and also the 10 commandments

Hebrew 7:12
For the priesthood being changed, there is made of necessity a change also of the law.

Some preachers these days claim that the new testament is not part of the scriptures, but this is not true.
Even before the time of the new testament, God said he'll make a new covenant with Israel.
Jeremiah 31:31-33

Jeremiah 31:31-33
[31]The Lord says, “The time is coming when I will make a new covenant with the people of Israel and with the people of Judah.
[32]It will not be like the old covenant that I made with their ancestors when I took them by the hand and led them out of Egypt. Although I was like a husband to them, they did not keep that covenant.
[33]The new covenant that I will make with the people of Israel will be this: I will put my law within them and write it on their hearts. I will be their God, and they will be my people.

A lot of pastors today stop their members from eating some kind of animals. But we should know that this is no longer applicable after Christ came.Every living creature on planet earth is a meat for man.

1Timothy 4:4
4For every creature of God is good, and nothing to be refused, if it be received with thanksgiving:

Genesis 9:3 Every moving thing that liveth shall be meat for you; even as the green herb have I given you all things.

How can we be sure a preacher is sent by God?

A true preacher sent by God teaches in accordance with the Bible. They preach what is written in the Bible they don't invent their own words that will favour them and attract people to their. All his teachings are based on the Bible.

John 7:17If any man will do his will, he shall know of the doctrine, whether it be of God, or whether I speak of myself.

John 3:34 For he whom God hath sent speaketh the words of God: for God giveth not the Spirit by measure unto him.

Mathew 24:5 For many shall come in my name, saying, I am Christ; and shall deceive many.

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