All people are creation of Allah, wether they are infidels or Muslims or anyone.
Allah has given the Muslims the 'duty' of the prophets. This however does not mean that every muslim is a prophet, but it merely means that before only prophets were entrusted with the duty of carrying the word of God forth to the people.
However in his last sermon, Mohammed(s) told the people that it is now their duty to take the message to those not present.
Thus our relationship with the infidels is like that of a teacher to a student.
It is our duty to convey to them the word of God, however if they reject it the Quran commands to say to them in the end (after all debates and discussions have come to a close without any results), to say, "To you be your religion and to me mine"
And to maintain good relationships with them, not to deny them kindness (ie be kind to them), to even help them (as long as they are not doing something againts the Muslims or Islam) and to even protect them (under a Islamic State, Muslims have to protect the minorities as long as they obey the laws and pay their taxes, etc.)
So this image you may get from different sources that Islam tells everyone to "kill the infidels" is entirely untrue.
A verse commonly used by radical anti islamic groups is one which talks about 'smiting the infidels nd killing them where ever you find them' (to the bros and sis if u have the ref to that verse please kindly post it)
However that verse, or rather the chapter in which that verse occurs is talking about a battle which took place 1500 years ago. In that battle the non-muslims would not stop attacking the Muslims and were reverting to inhumane tactics, thus the commandment against them was to fight them ferociously until they stop. All commandments on war in Islam are only up to the point that battle stops. As soon as either peace is called or defeat of the other side, the war is to stop immediately. Because Islam wants to give people peace, harmony and security - not war like many countries today are bent on doing even against popular world opinion and consensus.
Anyways I hope that helped a lil.
TC & BW
Aku