This is not well supported by Scripture, Ravenwolf. The Church has always been, and still is still made up of sinners.
Also i do not see the kingdom of God as being the same as the kingdom of heaven.
The kingdom of God is within you now, but at the great harvest you will be gathered up to heaven.
I say you, but i hope me too.
" The Church has always been, and still is still made up of sinners....
You make a good point but i was referring to the claim of the Churches and the Popes infallibility"
Infallibility is in no way contradicted by the Church being made up of sinners (including the pope, of course.) Infallibility does not mean sinlessness. In fact, infallbility doesn't even mean some power to be an all-purpose oracle and say the right thing at all times.
All infallibility is, is a gift which protects the Church from being damaged by the mistaken opinions of popes. It's an entirely "negative" gift: it means error-prone popes will not be able to inflict theological errors on the Church on matters of faith and morals.
This humorous but pointed video may be entertaining to you: it sure was to me:
How to Explain Papal Infallibility in Two Minutes (YouTube Link)
Have a wonderful Thanksgiving, ravenwolf!