They don't move the profit back to the US, but through Ireland and the Netherlands they move it out of the EU mostly to some tax havens in the Caribbean. From there they use them for their stock buybacks, which I think equals mostly flowing back into the US.
Again, not flowing back to the right people. All of this could have been solved by sane redistribution, but no. It'll still be redistribution but in a cruder, less apparent form.
This is no longer true. Said loophole was eliminated in 2017, and completely closed in 2020.