Not exactly. What is taught in the Book of Mormon is that baptizing infants *for the remission of sins* (with the implication that unbaptized infants cannot be saved) is heinous.

Here are the applicable passages. Moroni is quoting his father, Mormon, who preached against a group of people who held this belief/practice. This was around 400 years A.D., in the Nephite civilization (which was somewhere on the American continent). (Note this means he was certainly *not* talking to today's Roman Catholic or Protestant churches.)

Moroni 8:11

"...little children need no repentance, neither baptism. Behold, baptism is unto repentance to the fulfilling of the commandments unto the remission of sins."

To me, it is clear that Mormon is preaching against specific people who believed that little children who die without baptism are damned:

Moroni 8:13

"Wherefore, if little children could not be saved without baptism, these must have gone to an endless hell."

Moroni 8:15

"For awful is the wickedness to suppose that God saveth one child because of baptism, and the other must perish because he hath no baptism."

That's a little different than just being upset at people who baptism infants as part of their Christian tradition.

Now some Mormons may (without much thought) quote Mormon's "it is a solemn mockery before God, that ye should baptize little children" (Moroni 8:9) to condemn various other Christian groups without the context of the other verses I've mentioned above. I believe such people are very much in the wrong.

However, if groups today are teaching that infants who die without baptism are eternally damned-- then in my opinion Mormon's harsh words are right on target.