I'm a joke? Is THAT all you got?

In the REST of the PASSAGE, Peter THEN explains WHY God or Jesus GAVE him the "vision".

You are in error for taking a PART of a "passage" / story and trying to use it for some type of argument that has an entirely different meaning.

Here's the REST of the "story".

Acts 10

17 Now while Peter doubted in himself what this vision which he had seen should mean, behold, the men which were sent from Cornelius had made enquiry for Simon's house, and stood before the gate,

18 And called, and asked whether Simon, which was surnamed Peter, were lodged there.

19 While Peter thought on the vision, the Spirit said unto him, Behold, three men seek thee.

20 Arise therefore, and get thee down, and go with them, doubting nothing: for I have sent them.

21 Then Peter went down to the men which were sent unto him from Cornelius; and said, Behold, I am he whom ye seek: what is the cause wherefore ye are come?

22 And they said, Cornelius the centurion, a just man, and one that feareth God, and of good report among all the nation of the Jews, was warned from God by an holy angel to send for thee into his house, and to hear words of thee.

23 Then called he them in, and lodged them. And on the morrow Peter went away with them, and certain brethren from Joppa accompanied him.

24 And the morrow after they entered into Caesarea. And Cornelius waited for them, and had called together his kinsmen and near friends.

25 And as Peter was coming in, Cornelius met him, and fell down at his feet, and worshipped him.

26 But Peter took him up, saying, Stand up; I myself also am a man.

27 And as he talked with him, he went in, and found many that were come together.

28 And he said unto them, Ye know how that it is an unlawful thing for a man that is a Jew to keep company, or come unto one of another nation; but God hath shewed me that I should not call any man common or unclean.

29 Therefore came I unto you without gainsaying, as soon as I was sent for: I ask therefore for what intent ye have sent for me?

30 And Cornelius said, Four days ago I was fasting until this hour; and at the ninth hour I prayed in my house, and, behold, a man stood before me in bright clothing,

31 And said, Cornelius, thy prayer is heard, and thine alms are had in remembrance in the sight of God.

32 Send therefore to Joppa, and call hither Simon, whose surname is Peter; he is lodged in the house of one Simon a tanner by the sea side: who, when he cometh, shall speak unto thee.

33 Immediately therefore I sent to thee; and thou hast well done that thou art come. Now therefore are we all here present before God, to hear all things that are commanded thee of God.

34 Then Peter opened his mouth, and said, Of a truth I perceive that God is no respecter of persons:

So in the END, Peter's vision had NOTHING to do with dietary law. It had to do with gentiles being allowed by GOD to be Saved through Jesus just LIKE the Jews that Peter had taught to previously in Acts.