E.g. Norsemen in Greenland and the Inuits, it's known they have skirmishes, so how do you know if a Norse object found in an Inuit household is from trade and not war?
Note that I'm not personally trained as an archaeologist and it is likely that this comment of mine has some mistakes.
The interpretation of a single artifact is so difficult in most cases that some hypothetical conjecture of individual researchers cannot sometimes been distinguished from more concrete observation.
To give an example, three intact insular (Irish) style reliquaries like Melhus Shrine, usually dated to the 9th century, have been found in graves from Viking Age Norway so far. While the majority of scholars have regarded them as loot from Irish monastery by some Norse raiders (Vikings), a new book by E. Mikkelsen suggests an alternative possibility that an Irish missionary brought it to Central Norway (Mikkelsen 2019: 32-35). A fragment of the leather strip attached to the reliquary, together with the intact form of the object, that suggests the rather continuous use of the subject before the burial, lead to two almost completely opposite hypotheses: One is that some pagan woman (ON völva?) put it on in some ritual purpose (Pettersoen & Murray 2018), totally different from its original use, another is Mikkelsen's missionary one.
As for OP's example (Norse objects found in Inuits' settlements), the classical hypothesis had also proposed third alternative that Inuits collected them in abandoned Norse sites for a while after the demise of Norse Greenland (thus it was not the result of direct contact between the two groups in medieval Greenland), but this hypothesis now largely abandoned (for the origin of the majority of the Norse objects) due to the revised dating of the Inuit settlement to set its date rather earlier than the final phase of their Norse neighbors (ca. 1400). The opinion of the researchers differs also for this topic, however, since it is difficult to interpret the wide spacial as well as temporal distribution of Norse materials in the Far North Canadian isles either as a result of sporadic contact between the Norse and late-Dorset as well as Thule (Inuit) peoples from the 12th to the 14th century or rather as a secondary dispersion by Inuit trade route after their first acquisition from the Norse people. The advocates of the former hypothesis tend to favor rather peaceful nature of their early contact (Sutherland, Gulløv in: Fitzhugh & Ward 2000) since most of the record of skirmishes between the Norse and Inuit peoples concentrated in the 14th century, I suppose.
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