But most importantly, evidence of speciation does nothing to advance the claim of universal common ancestry. Speciation is fully compatible with the claim that multiple lineages were created independently and endowed with a degree of genetic adaptability. The fact one species can give rise to another similar species does not mean there are no limits to the process, that a bacterium can give rise to a human. (emphasis added) On the contrary, the experimental data cited previously suggests the opposite.
One need not be a creationist to question the extrapolation from speciation to universal common ancestry. As Brand notes, “Some scientists are beginning to doubt that the microevolutionary process extrapolated over time is adequate to produce more significant changes. They suggest that larger scale evolution must involve a different mechanism than microevolution and that it happens rapidly. (Ridley 1993, p. 523-525).” (Brand, 120.)
This is a big change in your position. A brief read of your post history sees you have often implied, or directly stated, that one species cannot turn into another.
Now you are saying a species can give rise to another similar species, and earlier in another post you defined macroevolution as species changing into another species. So you have implicitly said macroevolution is possible, you just disagree with the level of change that is possible.