I suspect everyone makes mistakes: my own experience is sufficient to confirm that without reference to religious superstitions dating from antiquity.
True - but my problem with christianity is it assumes that
before the fact, assuming that babies are born sinful (due to the sins of their predecessors back to genesis). That is what I have an issue with.
In my mind a new born baby has done nothing wrong, they aren't guilty, they are not sinful (not that I would use that term). To presume they are is wrong in my opinion, albeit they may very likely do something wrong, or indeed many things wrong later in life. And to ascribe a newborn as sinful on the basis of actions of others, presumable forefathers, is grotesque in its moral 'wrongness' in my view and leads to the horrors perpetrated on the basis of collective inherited guilt over the past millennia.