Alright... and??
FWIW, I'll stipulate that I personally believe (with the vast majority of historical Calvinist commentary) that God graciously ordains to apply the infinite Merit of Christ's atonement to those whom He has ordained to die in infancy. That said, what we have here is a clear application of Grace in the absence of volitional human choice "in favor of" that Grace.
How exactly does this aid the Arminianist position?