2 Corinthians 11:15

15 It is not surprising, then, if his servants also masquerade as servants of righteousness. Their end will be what their actions deserve.

Read 2 Corinthians 11:15 Using Other Translations

Therefore it is no great thing if his ministers also be transformed as the ministers of righteousness; whose end shall be according to their works.
So it is no surprise if his servants, also, disguise themselves as servants of righteousness. Their end will correspond to their deeds.
So it is no wonder that his servants also disguise themselves as servants of righteousness. In the end they will get the punishment their wicked deeds deserve.