The first commandent says: You shall have no other gods before Me.
It doesn't deny the existence of other gods; just that you can't put them before YHWH.
So I'm sure the creation stories had a little from Brahma, a little from Tiamat, etc.
Anyhoo.. got off topic for a bit.
I'm an atheist. I'm covered with religious work; Tibetan Buddhism, Satanism, Hindu, Christian, Hebrew, Christian Mysticism.... you name it.
I don't really think there's a conflict with religious imagery on a nonreligious person.
Sure, having Hindu gods on my neck has led to a lot of conversations about respect and culture (the best being a Hindu friend defending me to her daughter- "if you love Lord Krsna more than he does, why is he not on YOUR neck!". Gotta love my Pushpa Dashwani!) and the Baphomet on my hand has led to more than a few fun situations but by and large...
It's no different than having Peter Pan tattooed on you. Which I do. Hah.