While evolution is yet "just a theory", it is one that is based upon scientific methodology, and can be (at least partially) proven (natural selection re: microbes and fruit flies would be most recognizable examples). I suppose "proof" will have to wait until time travel is available, or we see one species actually mutate into another species. Given the short attention spans of us impatient humans, the former is more likely.
Creationism, on the other hand, is based on what? Legends passed down over thousands of years. Then compiled into "book" form, then re-written and re-written untold numbers of times before the printing press made it (somewhat) more consistently repeated. That, and the emotional reactions of those who wish not to be associated (in
any distant way) with "animals". How does creationism explain dinosaurs, australopithecines, or carbon-dating? Before you answer, please review previous posts re: faith as a valid source of knowledge.
And BTW, I am sorry to hear about your Uncle Chester!
Bob