It seems to me that the objections for baptizing infants is typically based on the belief that Protestants baptizing their infants is done for the same reasons the Catholic Church does. It is believed by some that all who baptize infants do so because they believe the water assures the infant shall have everlasting life if death should come to the infant.
There is and always has been massive confusion about water baptism. It is so often linked to salvation by some Protestants as well as Catholics that the opinion of baptizing infants as a means of bringing them into the Covenant body of Christ OUTWARDLY is given little if any consideration by those who believe infant baptism should not be done.
In my experience I've come to understand the reason some Protestant Denominations practice infant baptism is NOT because they believe the water some how eternally saves them, but because they desire to include their children with the Covenant body of Christ on earth. Why would some feel it is important for infants and young children to be included within the body of Christ outwardly? Because God gave the Church the responsibility of bearing witness to the Kingdom of God on earth. Christ left His Church with gifts before ascending to the father after His resurrection.
Ephesians 4:11-16 (KJV) And he gave some, apostles; and some, prophets; and some, evangelists; and some, pastors and teachers; For the perfecting of the saints, for the work of the ministry, for the edifying of the body of Christ: Till we all come in the unity of the faith, and of the knowledge of the Son of God, unto a perfect man, unto the measure of the stature of the fulness of Christ: That we henceforth be no more children, tossed to and fro, and carried about with every wind of doctrine, by the sleight of men, and cunning craftiness, whereby they lie in wait to deceive; But speaking the truth in love, may grow up into him in all things, which is the head, even Christ: From whom the whole body fitly joined together and compacted by that which every joint supplieth, according to the effectual working in the measure of every part, maketh increase of the body unto the edifying of itself in love.
In the same manner God gave His chosen nation, Israel of Old His Word through Covenants, prophets, priests and the Law. And the chosen nation of Old was commanded to practice Covenant continuity by circumcising eight day old infants, that they might be set apart from all the other nations of the earth. Even those who were later shown to be in unbelief were included in this ordinance.
Being of the same desire some Protestant denominations baptize infants that they too might be included in the Covenant Church body that they may be separate from the world in unbelief. The desire of parents being that as their infants grow the gifts that Christ gave His Church on earth might be available to them as well as to adults. Through the Gospel preached, and apostles, prophets, evangelists, pastors, and teachers, these baptized infants might also learn of Christ by grace through faith and one day they too, as did their Covenant parents, profess Christ as their Lord and Savior, turning to Him in repentance, believing in Him for everlasting life.
In my experience Protestant, mostly Reformed Churches, like the chosen nation of Old, practice Covenant continuity by baptizing their infants and training them up through the gifts Christ has given His Church on earth. I, personally see nothing in Scripture to forbid this practice of baptizing infants. IMO believing as the ordinance Christ gave His Church of those who are baptized may be assumed for infants of believers holding to the promise of God "is unto you, and to your children". Bringing infants under the hearing of the Gospel, the prayer of these parents is that they too might one day be pricked in their heart, and repent and believe.
Acts 2:37-39 (KJV) Now when they heard this, they were pricked in their heart, and said unto Peter and to the rest of the apostles, Men and brethren, what shall we do? Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost. For the promise is unto you, and to your children, and to all that are afar off, even as many as the Lord our God shall call.