And to clarify macro evolution is not one "kind" of organism evolving into another "kind" it's a tein nested heirarchy of speciation events giving rise to new clades within the parent organisms prexisting clade. For an organism to evolve into a separate clade of progenitors would violate the law of monophyly.
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because that doesn't fit into their creationist belief system. So they refuse to accept it no matter what the evidence says0