Uncomfortable Questions for Catholics #2: Is Water Baptism & Mass Essential

Rob Zins has authored the books, "On the Edge of Apostasy," "Romanism: The Relentless Roman Catholic Assault on the Gospel of Jesus Christ" & others.
More questions for devout Romanists:

1. Is infant baptism essential for salvation? In other words is water baptism by a Roman Catholic priest essential for salvation for infants & older people? If not, how could the thief on the cross be saved in Luke 23:42-43? Without water baptism for salvation where would Roman Catholicism be as a sacramental system of salvation?
2. Is the origin of the RCC Mass the last supper? If so then how can the last supper be the same as Calvary which is an event yet future to the last supper?
   Is Roman Catholicism & Biblical Christianity the same thing? No, Romanism & Christianity are not the same thing. Christianity is properly defined by certain doctrines that are revealed in the Bible. It is not defined by simply saying that as long as you believe in Jesus, you're a Christian. Mormons believe in Jesus, but their Jesus is a brother of the devil in the pre-existence. The Jesus of the Jehovah's Witnesses is Michael the Archangel. So, just saying you believe in Jesus doesn't make you a Christian. This is why the Bible tells us who Jesus really is, God in flesh, creator of the universe. Likewise, there are essential doctrines, & if any of those essential doctrines are violated, then a church would only appear to be Christian but not really be Christian. What are those doctrines? The Bible tells us. Let's take a look.
   1.There is only one God and you are to serve no other gods (Exodus 20:3; Isaiah 43:10; 44:6,8).
   2.Jesus is both God and man (John 1:1,14; 8:24; Col. 2:9; 1 John 4:1-4).