Ja, allerdings genügt das zum Beweis nicht. Du musst auch zeigen, dass sie sich anders und besser verhalten würden wenn sie keinen hatten.

Ich glaube der Zusammenhang von Alkohol und Aggression wurde schon mehrfach untersucht. Z.B.:

According to the World Health Organization, alcohol consumption is associated with aggressive behavior more closely than the use of any other psychotropic substance (e1). The relationship between alcohol consumption and aggressive behavior has been well documented in epidemiological studies. Alcohol-related aggression results in considerable personal suffering and socioeconomic costs every year.

https://di.aerzteblatt.de/int/archive/article/147679

The results suggest that the pharmacological effects of alcohol play a primary role in the relationship between alcohol ingestion and aggression.

https://pubmed.ncbi.nlm.nih.gov/7674681/

The current review provides the first comprehensive quantification of these specific effects across studies, suggesting that male participants who consume alcohol are significantly more aggressive toward females than those who do not (d = .36) and that alcohol is a comparable proximal risk factor for both sexual (d = .32) and intimate partner (d = .45) aggression.

https://pmc.ncbi.nlm.nih.gov/articles/PMC4798910/