Not true according to Scripture. In Matthew 13:33, JESUS said, "The kingdom of heaven is like unto leaven, which a woman took, and hid in three measures of meal, till the whole was leavened." According to you, the kingdom of heaven being compared to leaven means it is sinful and corrupt. Likewise in Luke 13:20-21~ Again He (JESUS) asked, “To what can I compare the kingdom of God? It is like leaven that a woman took and mixed into three measures of flour, until all of it was leavened.” You contradict the words of Jesus. In Leviticus 23:17, the feast of Pentecost is to be celebrated with leaven-baked bread. Ye shall bring out of your habitations two wave loaves of two tenth deals: they shall be of fine flour; they shall be baken with leaven; they are the firstfruits unto the LORD. Are these first fruits unto the Lord also sinful and corrupt according to you? Or will you acknowledge your error, tender an apology, and withdraw your hostility? One can always hope... even though you have steadfastly refused to apologize to me for all your hostility and bearing of false witness.
You seem to be misunderstanding the nature of parables. Parables are like pictures. The entire picture tells the story, but in describing a picture using words one must start with some particular aspects of the picture and then add others. When Jesus says that the kingdom of God is like [this picture], He does not intend us to assume that the first element of the picture is the only thing that represents the kingdom in the picture. The entire picture represents the kingdom and how it works.
These parables are equivalent:
"The kingdom of heaven is like leaven which a woman took and hid in three measures of meal, till the whole was leavened."
"The kingdom of heaven is like a woman who took leaven and hid it in three measures of meal, till the whole was leavened."
"The kingdom of heaven is like three measures of meal in which a woman hid leaven, till the whole was leavened."
"The kingdom of heaven is like leaven which a woman took and his in three measures of meal, till the whole was leavened."
It is a picture revealing a particular dynamic that occurs in the Kingdom of God: that a woman (the harlot, false religion) will insinuate into the three measures of meal (the church) leaven (hypocrisy) until eventually the whole church becomes leavened (hypocritical). "When the Son of Man comes, will He find faith on earth?" Lu. 18:18
"That day of the Lord will not come until a great falling away comes first. and the son of perdition sits in the temple of God, the church, pretending to be God." 2 Thess. 2:3-4
"A little leaven leavens the whole lump." 1 Cor. 5:6; Gal. 5:9