It has been said that a convert must avoid aspects, or relics of their non-Jewish life, from before conversion. I have heard some rabbis say, all ties to genetic family are severed with conversion. The relationship with the old family must end. Is this true for all of Orthodoxy?

Shalom. The following article from Chabad.org claims that one should ‘offer one’s back / cheek’ to no one but Hashem: https://www.chabad.org/library/article_cdo/aid/1791975/jewish/Is-Turning-the-Other-Cheek-a-Jewish-Value.htm This does seem to me to be a fair reading of Eicha 3:30, but it does no...