Denying that he was, and is, both 100% God and 100% man is a bigger insult and affront to the Truth -- and Jesus Christ is Truth personified -- than any picture anyone could paint, and yet there are so-called "Christians" (not Catholics, either) who do exactly that.
The operable word is man. Christ came to become a man. It was as a fully grown man that He became our substitute and died on the cross. The constant image, put forth by Catholics, of Christ as a baby on His mother's lap is not respectful to His manhood and puts forth a false impression of who He is today. It causes the image of Mary being superior to Him to be ingrained into the minds of many Catholics.
How would you feel if your mother had baby pictures of you and constantly pulled them out and showed everyone your baby pictures though you were a full grown man. You would definitely be very embarrassed. This is what Catholics are doing to Christ when they constantly present Him to the world as a baby on the lap of His mother. It is not the proper image of a fully grown man. Pictures of you that your mother, if your were/are a man, would be constantly showing the world you would certainly hope would be as an adult. The only way your mother would constantly show baby pictures of you on her lap, if you are fully grown, would be if your mother was a little "off".
Because of how many Catholics venerate Mary to the extent that she is a goddess and have doctrines about her that hardly show a difference, whether Catholics want to admit it or not, what many Catholics end up doing is worshiping Mary.
In Scripture the admonition is clear and strong that we are to worship only God. These constant pictures of our fully grown Christ as a baby on His mother's lap do not help people realize that it is not she that is to be worshiped but rather The Father, Son and Holy Spirit.
Jesus, who is God, did become a man but we do not need constant pictures of Him as a baby to show this. He grew up!
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Rev 22:8 And I John saw these things, and heard [them]. And when I had heard and seen, I fell down to worship before the feet of the angel which shewed me these things.
Rev 22:9 Then saith he unto me, See [thou do it] not: for I am thy fellowservant, and of thy brethren the prophets, and of them which keep the sayings of this book: worship God.