You wrote:
“Whatever church you belong to, or none, or whatever faith you have, or none, OF COURSE you believe it is the one true faith. Who adheres to a belief system he does not believe is true?”
Actually, if you ask many Protestants here, they will tell you they do NOT believe their sect is the one true Church. They will make the obvious distinction between faith and Church which is necessary for Protestantism to survive.
“Of course, true believers acknowledge that what they believe they believe by faith.”
No. I believe what I believe about the Church based on historical fact. Yes, my faith is based on faith, but my view of the Church was first historical.
“And rational believers have no reason to attack other faiths, even though they may believe those faiths are wrong.”
False. It is the MOST rational thing to do to attack that which is false if the stakes are high. There is no stake higher than eternity.
I might question or challenge another faith, but if my is to convince or convert another, attacking is no way to accomplish it.