Ever been on a bus or in a public place and someone says to a total stranger - "God loves you". Ever notice that these are always Bible thumping Jesus cultists? This has happened to me quite a few times over the years and its usually in the summer. Its like the nice weather bring them out.
If Im not busy and feel like it, I will respond, "I know. Allah has always loved me and has been good to me". Almost all of them have that gobsmacked look on their face in response. Usually, i just walk away.
But one of them responded immediately, that's not what I meant. So I said, right, muslims who believe their god is the one true God are wrong, but your God, who you have never seen, is the real God. And I walk away.