Um, no, the problem is that they are dishonest to the core and refuse to accept valid evidence presented to them because they don't want to believe that evolution occurs. Demanding impossible evidence is just a corollary.
It is noticeable for a scientist or for anybody interested, but for a creationist a slightly different mote or bird will never be a proof of speciation: it is anyway very similar to the original species, and it will be explained away by saying that is was already there or something similar.
As mentioned, a more radical event should happen to convince these people (so radical as to be impossible).
No, a "more radical event" will not convince creationists. There is already evidence enough to convince any reasonable person - more evidence of any kind will not change anything.
> for a creationist a slightly different mote or bird will never be a proof of speciation
As I noted, for a Creationist nothing will ever be proof of speciation. But apparently telling such simple truths gets downvoted.
> As mentioned, a more radical event should happen to convince these people (so radical as to be impossible).
No, no event, not matter how radical, would convince them because they are ideologically committed to rejecting evolution, which they see as contrary to their entire belief system.
You're wrong, and that silly ad hominem is content-free. What I said about Creationists is supported by large amounts of evidence in addition to my own personal experience engaging with them.
Your comment was nothing more than ignorant, content-free bigotry and gross generalization against Christians. How many Christian scientists would laugh at your characterization of their beliefs.
"to the point of beeing unnoticeable"
It's not unnoticeable; read the fricking article.