Lots of different questions and statements in there, all good discussions points. Hard to give a response here that satiafies. But simply put: There is truth, and there is everything else. Truth is not relative. What is true is true regardless of whether most people believe it or not.
This is true: Christ is Lord. And any religion that denies Christ's lordship is a false religion.
That said, all people are made in God's image and therefore all are to be shown respect and dignity. I won't go into the religious war topic, partly due to the medium here, partly because it is a tired critique of Christianity.
As for the number of denominations question: There is one faith, one Lord, one baptism, one Church. The denominations are like different rooms in a house. They have their distinctions—some might be nicely furnished, some not, some welcoming, some cold, some new and some in disrepaire, but they are all in the same house. And Christ is the owner of the house.
