I raise a point of attention: the traditional idea of the early Gothic mass conversion to Arianism, also due to the interpretation of numerous texts by Saint Ambrose, such as the epistle to Marcellina, in which the bishop of Milan explains a perfect overlap between Goths and Arians, Romans and Nicenes, which from religious propaganda texts as they were, are seen as historiographical testimonies, is the subject of continuous revision, at least in the Italian and Spanish context
First of all, the idea that the Arian religious choice was already an instrument for the construction of identity in the second half of the 4th century, implies a nineteenth-century vision of the concept of people, which was not present at the time: the "identity model ” in fact implies the presence of two compact groups, or who at least perceived a common belonging to the same macrogroup and recognized each other in their adherence to particular symbols; on the other hand, the massive adhesion of the barbarians to the Arian creed and of the Romans to the Nicene creed is taken for granted, without taking into consideration either the changes that occurred in the religious balance of the empire, nor the oscillations that characterized the political and diplomatic relations between Rome and the Goths.
Secondly, starting from the 90s of the last century, scholars of Roman law have proceeded with a profound re-examination of the problems linked to the application of the law in the late ancient period, and particular attention has been dedicated to the specific characteristics of the anti-heretical norms in the Theodosian and post-Theodosian. This led to reducing the scope of the imperial measures and to proposing a reconstruction on the basis of which the legislative activity would not lead to an immediate unification of the imperial population from a religious point of view, which would instead struggle to establish itself, leaving large spaces for action to non-Nicene groups
Thirdly, studies relating to Gothic history, starting from the first formulation of the theory of "ethnogenesis" by Wenskus and Wolfram up to subsequent reworkings, have shown how the "Goths" are not to be understood as an always and continuously existed, but rather the product of a long process of mixing groups of different backgrounds and origins, with an identity in continuous transformation.
Therefore we tend to divide Gothic history, from a religious point of view, into three phases: the first includes the period between the 3rd century and 401, the date in which Alaric left with his entourage from Epirus towards the West . In it we find a phenomenon that can be defined as "involuntary evangelization", re-elaborating Gibbon's formulation, in which Christianization does not seem to depend on any planned action, but arises from prolonged contact with pre-existing Christian communities, both in Gothia and elsewhere. interior of the empire. During the period of stay in Moesia II and Thrace, the signs of a "voluntary evangelization" seem to be able to be identified, in which some bishops of the area seem to make contact with the barbarians in order to convert them to their beliefs. In this phase, the conversion does not occur exclusively in a subordinationist or Nicene sense, but is modulated on the basis of the faith professed by the communities with which the Goths, still faithful to traditional cults, must have come into contact. Therefore, both the Arian Goths and the Nicaean Goths, of whom we also have numerous testimonies in the documents of the time, are two small minorities compared to the followers of the traditional cult: Christianity in its variants was essentially widespread among the elites, who they used not to distinguish themselves from the Romans, but to highlight their acculturation process, which was a sort of identifier of social and political status
The second phase is in the era of Alaric, which corresponds to a crucial moment in the process of formation of the group that will then be
settled in Gaul and Spain. During the campaigns fought in Italy, in fact, the group that left Epirus saw a very strong increase in numbers due to the passage between the ranks of the barbarian army of some components that had previously been part of the Roman team, who were both foederati and Romans: so the rate of conversion to Christianity, in both the Arian and Nicean variants, grows exponentially
Only in 418, with the settlement in Aquitaine, in order to guarantee the maintenance - and indeed the expansion - of the sphere of autonomy acquired with the agreements with Flavius Constantius and Honorius, therefore as a conscious political choice, the adherence to the Arian creed , initially determined by particular circumstances and contingencies that were somewhat fortuitous, could be recognized as a distinctive element of the barbarian population compared to the Roman one, and exalted to the point of becoming a true cultural marker
What happens if instead circumstances lead to mass Niceanization in the first phase: in my opinion, Alaric's policy changes very little. Honorius might be more inclined to grant him the title of magister militum, but this also clashes with other factors and political considerations on the part of the emperor. Athaulf's position could be stronger and lead to a progressive integration between the Gothic and Roman elites, which could also be very different from what I'm enjoying telling you. Furthermore, given the Frankish and Lombard example, it is not certain that the conversion to Nicaean Christianity and the related cultural assimilation will lead to the destruction of the identity of the Gothic people