Holy water is ordinary water that has had a blessing recited over it, usually by a priest.

The origins of this idea go back to as early as the second century A.D., and down through history various popes and theologians have encouraged adoption of the belief that Mary is “Co-Redemptrix.”

I encourage you to give the Catholic faith another chance. At the same time, I hope you will do so with realistic expectations

Do you think guns should be allowed in sanctuaries (for protection)?

First, it's important to understand that not only Catholics practice infant baptism.

Granted that a mortal sin is possible, however, no sin is beyond forgiveness when a person is genuinely sorry and resolved to never repeat the sinful action again.