Greetings and peace be with you khalib;
See at the end of the day we are all acountable for our actions and unity is something we will all be asked, and in fact whoever deviates from it will be asked.
Unity is about getting on with with people who have huge differences to ourselves.
The unity of marriage comes to mind, fancy uniting a man and women together with all our differences, how can that work? I have been married for 29 years and my wife still says we have little in common, and sadly that also includes our faith in God. I think you have to work harder with relationships the longer you are together.
There are times she really gets on my nerves, and I know when this is going to happen, because the same kind of situations keeps occurring. I know I really aggravate her at times, sadly I am not the easiest person to live with.
Marriage is the union of two imperfect people; with imperfect children and grandchildren, we struggle with all our faults to stay together. Unity of religions just compounds the amount of imperfection, how can a billion imperfect people unite, when just two people struggle with unity?
However we juggle our beliefs about, we are all created by the same God, unity hangs and depends on how we are able to tolerate our differences. I know a billion people are going to live and die a Muslim, I can't change that, now I have to examine my conscience about uniting with people who are always going to be diiferent to me.
In the spirit of praying for a greater interfaith friendship