Your citing Amalek is accurate. We're actively discussing the very application of this point to the OP. If you want to join that convo, please confirm that you're able and willing to follow the its rules.

Quick take is that God knows when the entire tribe is guilty and so we can only use that when he reveals it. He has not revealed that all Jews are to be found guilty. In fact, there is no good Jew but Jesus, and there is no good Gentile either. The only "good" people are those found in Jesus. So we have no moral right to declare war preemptively.

In the link above I referred to the person of such holiness that he could perform all the judgment functions at once; Vlad may have at times been compelled to be such a person, I don't know. But without knowing where you're based now I'm not ready to assert your holiness today. (The community and the admins have asked me for reasonable objective regulations on civil speech, and to the degree you decline those regulations we must work our separate sovereignties.)