With the swastika being a spiritual symbol for centuries, to see it depicted on the palms like this really reinforces that spiritual connection. While the diagonal swastika has gathered a negative stigma in the west, and justifiably so due to the perversion of the symbol, in this instance the diagonal symbol is needed to make the design complete when his hands are put together.
As you can see, if he had an upright swastika the center line would have disappeared in the crease between his hands.
1DeX6 sent in this photo to the hand tattoo gallery. According to the description it was done at Tattoo Мастерская Александра Ветрова, in Omsk, Russia.