I can and I will be happy to explain it, because. . . it comes right from the Bible. St. Augustine agreed.
Jesus did not die for all men. He died for believers and they were chosen before the foundation of the world.
Ephesians 1:3-11English Standard Version (ESV)
Spiritual Blessings in Christ
3 Blessed be the God and Father of our Lord Jesus Christ, who has blessed us in Christ with every spiritual blessing in the heavenly places, 4 even as he chose us in him before the foundation of the world, that we should be holy and blameless before him. In love 5 he predestined us for adoption to himself as sons through Jesus Christ, according to the purpose of his will, 6 to the praise of his glorious grace, with which he has blessed us in the Beloved. 7 In him we have redemption through his blood, the forgiveness of our trespasses, according to the riches of his grace, 8 which he lavished upon us, in all wisdom and insight 9 making known to us the mystery of his will, according to his purpose, which he set forth in Christ 10 as a plan for the fullness of time, to unite all things in him, things in heaven and things on earth.
11 In him we have obtained an inheritance, having been predestined according to the purpose of him who works all things according to the counsel of his will,
Let's see what John 3:16 means in the context of the conversation between Jesus and Nicodemus.
It's helpful to understand the Greek word for "whosoever" is 'pas'. In the context of this verse it means more than one individual. It is collective.
From BlueletterBible.
G3956 - pas - Strong's Greek Lexicon (NKJV)
Outline of Biblical Usage [?]
- individually
- each, every, any, all, the whole, everyone, all things, everything
- collectively
- some of all types
Jesus himself didn't say everyone had a choice to believe. He said that those who would be chosen would be drawn by God the Father.
John 6:44
English Standard Version
44
No one can come to me unless the Father who sent me draws him. And I will raise him up on the last day.
Baptism by immersion was acceptable to Jesus, it should be good enough everyone. I can't imagine why Catholics would not want to emulate the actions of Jesus Christ. I know why and I'm guessing you will take it to heart.
I'm happy to discuss this with you as long as we can do so within the rules.
God speed.