Thor was a Norse (Viking) God, not a Greek God. Being an Aesir,
a certain type of God race, his enemies would have been the Vanir,
another God race. But according to Norse Mythology, the two sides
are now reconciled.
Thor isn't exactly the brightest being under Yggdrasil, and
though he's been deceived on multiple occasions by Loki, they
remain firm friends.