I'll stand corrected, then, insofar as the occurrence of an actual intercept is concerned. Nevertheless, that the occurence of such an intercept was regarded as plausible by many if not most knowledgeable observers - because it would have been (if it occurred) consistent with the rest of the Belarus actions - still provides a warrant for the claim here.
As for whether EUROCONTROL's initiatives oriented toward the future of ATM, airspace architecture, projects such as ECHO, are reasons for the organization to be particularly concerned about Belarus actions in this incident, well, I don't speak for EUROCONTROL. Nor do I write on its behalf.