When cathodox says all the early Christians are not Baptists, they are wrong, just look at Aerius during the 4th century
(4) Next he says, “What is the Passover you celebrate? You are giving your allegiance to Jewish fables again. We have no business celebrating the Passover,” he says; “Christ was sacrificed for our Passover.”
4 3,5 Then, after this: “Why do you mention the names of the dead after their deaths (i.e., in the liturgy)? < If > the living prays or has given alms, how will this benefit the dead? If the prayer of the people here has benefited the people there, no one should practice piety or perform good works! He should get some friends any way he wants, either by bribery or by asking friends on his death bed, and they should pray that he may not suffer in the next life, or be held to account for his heinous sins.
3,6 “And there can be no set time for fasting,” he says. ‘These are Jewish customs, and ‘under a yoke of bondage.5 ‘The Law is not made for the righteous, but for murderers of fathers and murderers of mothers6 and the rest. If I choose to fast at all, I shall fast of my own accord, on the day of my choice, because of my liberty.” (7) And they therefore make a point of fasting on Sunday instead [of the usual days], and eating on Wednesdays and Fridays. They often fast on Wednesday also, but by their own choice, they say, not by an ordinance.
3,8 And during the days of Passover, while we sleep on the ground, purify ourselves, endure hardships, eat dry bread, pray, watch and fast, performing all the saving < mortifications* > of the holy Passovers, they buy meat and wine early in the morning, stuff their veins, < and > burst out laughing in mockery of those who keep this holy service of the week of the Passover.
From: Epiphanius of Salamis, Panarion 75