What a bunch of hooey. My father's salvation does not influence mine. The Jewish Nation consists of God's chosen people. Individuals within it that reject God will suffer the consequences of that rejection. Did the disciples who walked away from Christ when He instructed to eat His Body and drink His Blood get a pass in their particular judgement? Gotta let God speak through Scripture Himself.
In the case of Christians, we gotta let the Church speak. It is after all, the foundation and pillar of Truth, not Scripture, as evidenced by the Scriptural mangling millions of people engage in. As you have posted here.
Yes just a reminder, that particular passage of Scripture was penned by Saint Paul.