>>”It is forbidden to worship false “gxds” (Halakhically Jews are required to die rather than do this), and Mattityahu killed him. “
Not to begin an argument, but as a rhetorical question, meant to provoke thought and introspection: Jewish people do not worship, today, as required by the Hebrew Bible. Even though one can say that it is no longer possible, such worship is still required. Is the casuistry making this possible intellectually and spiritually satisfying?
[This is not a condemnation: very few Christians bother to follow their own scriptures, either.]
DG
Since it is the actual worship of foreign "gxds" that is forbidden, your identification of this negative commandment with the positive commandment to worship G-d in a certain way misses the point.
Whether or not the Temple is standing and the service being offered, it is still forbidden to worship strange "gxds," and certain actions are actually capital offenses.