It seems that there are many other reputable scientists who also question the evidence too.

Well, by definition all scientists are committed to question evidence - that's what evidence is for, and that's what scientists do.

But the suggestion that, having questioned the evidence, "many reputable scientists" think that the case is not proved that there is already substantial climatic change with worse to come, and that human activity is contributing dangerously to this - well, it just is not true. It really isn't.

Remember how for years there were efforts to claim that smoking didn't cause cancer? There were always a few "reputable scientists" ready to back up that fallacy.