Do I think Jesus is loving his enemies? An author can have the characters he's writing do anything he wants them to. So in the spirit of the story, I'll say no. The Jesus character is not loving his enemies.
The poor saps getting crucified next to him are not his enemies, and so are irrelevant. It's the supposed existence and utility of hell that shows that the Jesus character does not love his enemies. If even one person ends up in said hell, then love is not a part of the Jesus equation. Only if the supposed hell is empty, and thus utterly useless and unnecessary, is the claim of the Jesus character loving his enemies rendered logically consistent.