The teachings of Roman Catholicism contradict Scripture at nearly every major doctrinal point.
- The Bible teaches that Christ’s sacrifice was once for all (Hebrews 9:28), yet the Catholic Mass claims to re-offer Him daily as an unbloody sacrifice.
 
It's the same one sacrifice.
	
		
	
	
		
		
			
- Scripture says salvation is by grace through faith, not of works (Ephesians 2:8–9), yet Rome makes justification depend on sacraments and obedience.
 
		
	 
Catholicism believes in grave moral obligations, the obligation to avoid grave sins.  Acts 9erism also believes in this.  (Acts 9erism is not antinomian, libertine Christianity.)
	
		
	
	
		
		
			
- The Bible says there is one Mediator between God and men, the Man Christ Jesus (I Timothy 2:5), yet Catholics pray to Mary and the saints.
 
		
	 
He is the One mediator because He is our High Priest.  Priest = mediator in this context.
	
		
	
	
		
		
			
- The bible declares that all have sinned (Romans 3:23) and that even Mary rejoiced in “God my Savior” (Luke 1:47), yet they claim she was sinless.
 
		
	 
There is more than one kind of salvation in the Scripture.
	
		
	
	
		
		
			
- Christ’s blood cleanses us from all sin (I John 1:7), yet Rome adds purgatory.
 
		
	 
Acts 9erism acknowledges there are temporal penalties associated with sinning.  The way you put it makes it seem like you believe there are never any temporal penalties from when Christians sin.  That's obv false, and you admit it.  You break the law, you go to jail.  That's a temporal penalty.  You get drunk, you fall down and hurt yourself.  You commit adultery, you get a divorce and ruin your family.  Heck the latter example shows that it's not just you who suffers the penalties from sinning, but others too, other innocent people.
	
		
	
	
		
		
			
- God alone forgives sin (Mark 2:7), yet priests claim that power through confession.
 
		
	 
No they don't.  It's Christ absolving, forgiving, remitting, in the confessional, he, as a priest, is acting in persona Christi.
	
		
	
	
		
		
			
- God forbids images in worship (Exodus 20:4–5), yet Catholicism promotes their veneration.
 
		
	 
Got a problem with a crucifix?
	
		
	
	
		
		
			
- Scripture never mentions Mary’s assumption into heaven, yet they dogmatized it.
 
		
	 
There are many things not mentioned in Scripture that are gravely immoral (gravely obligatory to avoid), e.g. abortion, smut, masturbation.  Whether or not Our Lady was assumed into Heaven, body and soul, the Scripture's simply silent about.  You have some proof it didn't happen?  No, you don't.
	
		
	
	
		
		
			
- The Bible alone is declared sufficient for doctrine and practice (II Timothy 3:16–17), Catholicism places “sacred tradition” on equal authority with God’s Word.
 
		
	 
Because it's Apostolic tradition.  It IS the Word of God.
	
		
	
	
		
		
			
In every case, the authority of Scripture is displaced by the authority of men, and the finished work of Christ is replaced by an ongoing system of rituals, mediators, and man-made decrees.
		
 
		
	 
The authority conferred in the Church's offices is Jesus's authority.