No, you certainly did not say we should makes Muslims our enemies. I was pointing out that saying they don't worship our God makes our relationship less friendly.
Let me take the discussion in a different way. The Prophet Muhammad, PBUH, reportedly spoke with the angel Gabriel to receive the message of the Qur'an. As we are Catholic and believe as Catholics do, we believe that it could not have been the angel Gabriel (or any angel of God, for that matter). If that's the case, there are three options 1) the Prophet fabricated the Qur'an, 2) the angel was sinister, or 3) the Prophet believed he saw things that he did not. Option 1 seems unlikely, as all reports of the Prophet seem to suggest that the Prophet was an upstanding man. Option 2 is possible; an elaborate ploy that mixes a lot of very good with just enough deceit to lead souls away from the true faith. There's some plausibility to this idea. Souls that would have otherwise followed the Christian path are instead Muslims, who are more likely (though perhaps not guaranteed) to follow the road to Hell. Option 3? Meh, I'm unsure.
But even given that I think option 2 possible, I still feel as if we should give the Muslims the benefit of the doubt on whether they attempt to worship our God. The religion does lead to a false idea of God, true, and we should always make it clear that we believe in the Triune God. Still, I think positive emotion trumps negative emotion every time (perhaps I've watched Inception too much), and if we can create some form of kinship by affirming this ecumenical idea, then I think we stand a far better chance of helping them to Christianity than we would if we simply condemned them. If we choose the latter, it seems that we would only succeed in ending dialogue.