Some more clues. Irenaeus provides more fragmentary information about what the heretics believed always juxtaposing the Pentacost story in Acts witj another story involving at its core 'Jesus' who was crucified and 'Christ who watched impassably. So we read in Book Three:
These [are the] voices of the Church from which every Church had its origin; these are the voices of the metropolis of the citizens of the new covenant; these are the voices of the apostles; these are voices of the disciples of the Lord, the truly perfect, who, after the assumption of the Lord, were perfected by the Spirit, and called upon the God who made heaven, and earth, and the sea,--who was announced by the prophets,--and Jesus Christ His Son, whom God anointed, and who knew no other [God]. For at that time and place there was neither Valentinus, nor Marcion, nor the rest of these subverters [of the truth], and their adherents. Wherefore God, the Maker of all things, heard them. For it is said, "The place was shaken where they were assembled together; and they were all filled with the Holy Ghost, and they spake the word of God with boldness" to every one that was willing to believe. "And with great power," it is added, "gave the apostles witness of the resurrection of the Lord Jesus," saying to them, "The God of our fathers raised up Jesus, whom ye seized and slew, hanging [Him] upon a beam of wood: Him hath God raised up by His right hand to be a Prince and Saviour, to give repentance to Israel, and forgiveness of sins. And we are in this witnesses of these words; as also is the Holy Ghost, whom God hath given to them that believe in Him." "And daily," it is said, "in the temple, and from house to house, they ceased not to teach and preach Christ Jesus," the Son of God. For this was the knowledge of salvation, which renders those who acknowledge His Son's advent perfect towards God.
But as some of these men impudently assert that the apostles, when preaching among the Jews, could not declare to them another god besides Him in whom they believed, we say to them, that if the apostles used to speak to people in accordance with the opinion instilled into them of old, no one learned the truth from them, nor, at a much earlier date, from the Lord; for they say that He did Himself speak after the same fashion. Wherefore neither do these men themselves know the truth; but since such was their opinion regarding God, they had just received doctrine as they were able to hear it. According to this manner of speaking, therefore, the rule of truth can be with nobody; but all learners will ascribe this practice to all [teachers], that just as every person thought, and as far as his capability extended, so was also the language addressed to him. But the advent of the Lord will appear superfluous and useless, if He did indeed come intending to tolerate and to preserve each man's idea regarding God rooted in him from of old. Besides this, also, it was a much heavier task, that He whom the Jews had seen as a man, and had fastened to the cross, should be preached as Christ the Son of God, their eternal King. Since this, however, was so, they certainly did not speak to them in accordance with their old belief. For they, who told them to their face that they were the slayers of the Lord, would themselves also much more boldly preach that Father who is above the Demiurge, and not what each individual bid himself believe [respecting God]; and the sin was much less, if indeed they had not fastened to the cross the superior Saviour (to whom it behoved them to ascend), since He was impassible.
and again:
These men do, in fact, set the Spirit aside altogether; they understand that Christ was one and Jesus another; and they teach that there was not one Christ, but many. And if they speak of them as united, they do again separate them: for they show that one did indeed undergo sufferings, but that the other remained impassible; that the one truly did ascend to the Pleroma, but the other remained in the intermediate place; that the one does truly feast and revel in places invisible and above all name, but that the other is seated with the Demiurge, emptying him of power. It will therefore be incumbent upon thee, and all others who give their attention to this writing, and are anxious about their own salvation, not readily to express acquiescence when they hear abroad the speeches of these men: for, speaking things resembling the [doctrine of the] faithful, as I have already observed, not only do they hold opinions which are different, but absolutely contrary, and in all points full of blasphemies, by which they destroy those persons who, by reason of the resemblance of the words, imbibe a poison which disagrees with their constitution, just as if one, giving lime mixed with water for milk, should mislead by the similitude of the colour; as a man" superior to me has said, concerning all that in any way corrupt the things of God and adulterate the truth, "Lime is wickedly mixed with the milk of God."