Was not this in the old also
Deuteronomy 24
16 The fathers shall not be put to death for the children, neither shall the children be put to death or the fathers: every man shall be put to death for his own sin.
That is a switch for you and the big 10.
Exod.20
[
5] Thou shalt not bow down thyself to them, nor serve them:
for I the LORD thy God am a jealous God,
visiting the iniquity of the fathers upon the children
unto the third and fourth generation of them that hate me;
Jer.31
29] In those days they shall say no more, The fathers have eaten a sour grape, and the children's teeth are set on edge.
[
30] But every one shall die for his own iniquity: every man that eateth the sour grape, his teeth shall be set on edge.
[
31] Behold, the days come, saith the LORD, that I will make a new covenant with the house of Israel, and with the house of Judah:
Maybe you can help me here.