One of the millions of idiots who infest Idiot America asked an idiotic question.

"Why do evolutionists act like a theory is a LAW? It's not a law until it's been proven to be a fact."

You have a few problems.

1. Biologists are called "biologists", not "evolutionists".

2. You don't know what a scientific theory is.

"Theory: In science, a well-substantiated explanation of some aspect of the natural world that can incorporate facts, laws, inferences, and tested hypotheses. The contention that evolution should be taught as a "theory, not as a fact" confuses the common use of these words with the scientific use. In science, theories do not turn into facts through the accumulation of evidence. Rather, theories are the end points of science. They are understandings that develop from extensive observation, experimentation, and creative reflection. They incorporate a large body of scientific facts, laws, tested hypotheses, and logical inferences. In this sense, evolution is one of the strongest and most useful scientific theories we have."
-- National Academy of Sciences

3. You don't know what a scientific fact is.

"Scientists most often use the word 'fact' to describe an observation. But scientists can also use fact to mean something that has been tested or observed so many times that there is no longer a compelling reason to keep testing or looking for examples. The occurrence of evolution in this sense is a fact. Scientists no longer question whether descent with modification occurred because the evidence supporting the idea is so strong."
-- The National Academy of Sciences

One more thing:

Evolution is the strongest fact of science. If you ever in your life want to educate yourself instead of making a fool out of yourself, go here and study it: Google "wikipedia evidence for evolution". It would take you more than a lifetime to study the whole thing.

But you would rather be a know-nothing science denier. Nobody cares. It's your wasted life.

In closing, drop dead retard.