Pilgrim,

Would you say that these men are hyper-covenantilist and their views on baptism present a danger to the faith?

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We must realize that at whatever time we are baptized, we are once for all washed and purged for our whole life. Therefore, as often as we fall away, we ought to recall the memory of our baptism and fortify our mind with it, that we may always be sure and confident of the forgiveness of sins.
-John Calivn, Institutes, 4.15.3

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And so we uttterly condemn the vanity of those who affirm the sacraments to be nothing else than naked and bare signs. No, we assuredly believe that by Baptism we are engrafted into Christ, to be made partakers of his righteousness, by which our sins are covered and remitted.
-John Knox's 1560 Scots Confession

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Elect infants do ordinarily receive the Spirit in baptism, as the first efficient principle of furture actual regenreation...It is most agreeable to the institution of Christ, that all elect infants that are baptized....do ordinarily receive, from Christ, the Spirit in baptism, for their first solemn initiation into Christ, and for their future actual renovation, in God's good time, if they live to years of discretion, and enjoy the other ordinary means of grace appointed of God to this end.
-Cornelius Burges, Westminster divine, The Baptismal Regeneration of Elect Infants, 1629