"[The term 'evil'] is deployed by those who would rather not try to understand or to explain and is simply used to imply condemnation."

I think that sums it up rather nicely, although it is not just condemnation, but also an assertion of one's own "moral superiority", which needs to be understood in the context of social status and advantage, especially when it comes to branding political opponents as "racists" ("racist" now being a synonym for "evil").

The BNP represents a social and political ideology which contradicts state social and political ideology of "colourblindness" (indifference to ethnic difference), which until relatively recently was fundamental to national identity (certainly in Europe), but was suppressed in overreaction to the criminally insane excesses of Nazi racial ideology.

This overreaction (also to the injustice and inhumanity of other rightwing racial ideologies, such as those embodied in Jim Crow and Apartheid), instead of being allowed to swing back to a reasonable position, was consolidated in its extreme form by political and economic opportunists, who (sincerely or disingenuously) claimed a spurious "moral high ground" for it, and themselves, of course, thus imposing on society to this day, the exact, but equally extreme, opposite leftwing (?) ideology of "colourblindness", of "race doesn't matter", (i.e. is of no social or political importance, except to "racists"), their ideological opponents thus being branded as "racists".

The state always seeks to brand its most serious opponents (those with a genuine alternative and legitimate ideology) as evil. In Stalin's Russia they were called "counterrevolutionaries" or "bourgeois"; in McCarthy's America, "communists" or "un-American", and in medieval Roman Catholic Europe, "heretics" or "non-believers".

In modern western democracies, such as Britain, opponents of their extreme racial ideology of "colourblindness" (which has become a fundamental part of state ideology) are dismissed and condemned as evil "racists".

An alternative, and far more reasonable, approach would be to recognise the central importance of race and ethnicity (when not suppressed and denied, even to oneself, as currently demanded) for an individual's sense of personal and group identity, and thus also for society and the body politic in general.