He made no distinction between us and them (outhen diekrinen metaxu hēmōn te kai autōn). He distinguished nothing (first aorist active ind.) between (both dia and metaxu) both (te kai) us and them. In the matter of faith and conversion God treated us Jews as heathen and the heathen as Jews.
Cleansing their hearts by faith (tēi pistei katharisas tas kardias autōn). Not by works nor by ceremonies. Peter here has a thoroughly Pauline and Johannine idea of salvation for all both Jew and Greek. Cf. Act 10:15.