Not at all ... Those committed to evil, whether it's mass murder of adults (Khmer Rouge), or mass murder of infants (Planned Parenthood), or sexual perversion (subject of this thread), or prostitution (mafia), or political corruption (democrat Party) ...
They all convince themselves that they're not doing evil, and proclaim their supposed "good intentions" to the world at large.
A moral relativist has no standing to say them nay.
Please keep in mind that I was responding to the comment about how those people must have felt. There is a lot of what we call evil in the world, and if you want to lump all of them together, good on you.