If you have a look at the Jewish laws linked to below you will see they apply to the Jewish people themselves and are not really applicable to Romans, Greeks or any-other nation. They are national laws for ONE nation only. Judaism is a national religion for Jews and nobody else.
613 commandments - Wikipedia, the free encyclopedia
Their laws even allow killing, see the short list below:
487 Save someone being pursued even by taking the life of the pursuer — Deut. 25:12
488 Not to pity the pursuer — Num. 35:12
545 The courts must carry out the death penalty of stoning — Deut. 22:24
546 The courts must carry out the death penalty of burning — Lev. 20:14
547 The courts must carry out the death penalty of the sword — Ex. 21:20
548 The courts must carry out the death penalty of strangulation — Lev. 20:10
549 The courts must hang those stoned for blasphemy or idolatry — Deut. 21:22
550 Bury the executed on the day they are killed — Deut. 21:23
555 The court must not kill anybody on circumstantial evidence — Ex. 23:7
51 Not to bow down before a smooth stone — Lev. 26:1 (Idolotry)
189 Not to benefit from an ox condemned to be stoned — Ex. 21:2 (Cruelty)
008 Not to destroy objects associated with His Name — Deut. 12:4 (Idolotry)
596 Destroy the seven Canaanite nations — Deut. 20:17
597 Not to let any of them remain alive — Deut. 20:16
598 Wipe out the descendants of Amalek — Deut. 25:19
599 Remember what Amalek did to the Jewish people — Deut. 25:17
600 Not to forget Amalek's atrocities and ambush on our journey from Egypt in the desert — Deut. 25:19
603 Not to offer peace to Ammon and Moab while besieging them — Deut. 23:7
There is only One God who is the I AM and he gave us Ten Commandments and Jesus gave us almost 40 more. These are universal laws and these are what all peoples of all nations should follow in accordance with One universal God.