My God sent his only begotten Son to live as a man, to die for our sins, to defeat death, in order to reconcile humanity with God. Do any Muslims believe their “Allah” did that? No? Well, then they’re not the same and should not be used as a euphemism for each other.
The substitution is as idiotic as substituting “God” for Zeus or Shangdi.
It’s intentional, insulting, and done to purposefully implicate Christians as complicit in the Orlando mass murder.