He came home. Again (the) crowd gathered, making it impossible for them even to eat. When his relatives heard of this they set out to seize him, for they said, "He is out of his mind." (Mk 3:20-21)
Jesus came back home. Whether he came to Capernaum or Nazareth the author did not give the details. But what the author wanted to underline by this was probably to say that Jesus had a place to come back and rest a while. Though he had left his own home as he started his ministry he was not jus go about with out any place of reference.
The crowd following him was so much that the people took away his personal time even time to have a meal. This probably showed the appeal that Jesus had among the people. People were taken up by his way of teaching and preaching and they realized that there were truths in his way of preaching and doing the mission that they could not resist themselves from flowing him.
This sudden and immediate following of such a crowd made his relatives to fear. They were worried, probably, of the consequences. The political, social and religious consequences were already thought of by his relatives. But his new way of approach to life and situations made them think that he was not on line with the tradition. They thought that he was mad.
