Ah. Ok. I think I see the problem. That verse didn't say anything about mere enemies. Workers of iniquity are a special grouping that must be considered far worse than mere enemies.
You see, an enemy's heart can be turned by love expressed to him or her by the object of their hatred.
Workers of iniquity, on the other hand, are a people whose hearts are harder than stone. Perhaps a good example were the Canaanites. The Lord called for their genocide, which gives ample evidence to their having been worse than just enemies, but actual workers of iniquity to merit a call from their Creator to wipe them out....men, women, children, livestock, gold, silver, et al.
Are there workers of iniquity today? Well, given that there's nothing new under the sun, as it's written, it's safe to say that there are indeed workers of iniquity throughout all ages.
The Lord did not instruct that the Canaanites be proselytized. He called for their utter destruction. Mere enemies can be reached, where workers of iniquity cannot.
