As soon as they create a working definition of kind then they know that we can present a transitional species that bridges the gap between those kinds.
I don't believe that Creationists are playing 'hide the football' or 'move the goal posts' with "kinds". There
is no football and no "goal posts. Creationists don't have any way of telling whether a whale shark and a dwarf shark are of the same kind or are totally different kind until a scientists proves that those sharks share a common ancestor.
All they've got to go on is a very few verses in Genesis dealing with the kinds God created and the kinds Noah loaded on the ark. And IMO, their reading of those verses borders on numerology.
In short, the creationist definition of macroevolution is any evolution in contradiction to Genesis. It is indeed a waste of time to ask a creationist to do better than that.
Under a government which imprisons any unjustly, the true place for a just man is also in prison. Thoreau: Civil Disobedience (1846)
The apathy of the people is enough to make every statue leap from its pedestal and hasten the resurrection of the dead. William Lloyd Garrison.
Choose silence of all virtues, for by it you hear other men's imperfections, and conceal your own. George Bernard Shaw