I understood you quite well, which just shows how ignorant you are about the facts. It's not an excuse, it is an observation. Anyone that opposes evolution is just doesn't know the facts. It's the reason they stick to rhetoric; just like you are doing, and never discuss the science. There are so many examples of observed speciation, that the only reason that you wouldn't be aware of the is due to wilfull, active ignorance; here are two to start you out: 1) Oenothera gigas 2) Raphanobrassica
ERV provides sufficient and convincing evidence of common ancestry. Only evolution provides a viable explanation of the facts.