Earlier quoted context omitted.
Your post says that someone must be either "all for deserts" or "all against deserts." It's unclear why people seem to want to force this false dichotomy.
The dichotomy that I'm pointing out is not that people are "all for deserts" vs "all against deserts", you misunderstood my position. I'm pointing out a false dichotomy which is "all for environmental preservation" vs the position that "all environmental conditions are irrelevant".
I don't know what false dichotomy you are trying to point out but it doesn't exist, no serious preservationist or environmental scientists saying "all for X". We want to preserve what we can do not cause further needless destruction and degradation in the biodiversity of our ecosystem.
Many environmental problems including desertification are cause by us destroying natural habitats including deserts.
If you have a desert more or less contained in its "natural" state providing a habitat to multiple species do what you can to preserve it. If you have man accelerated desertification that is threatening to turn your arable land into sand dunes within the next 5 decades you should do what you can to slow it down, stop it, and then reverse it.
The only way of fighting desertification seems to be now to actually try to revert the damage you've done to the natural barriers and local environment in the first place. Sand dunes that have had migration patterns of barely a CM per year now migrating at rates of a few meters per year are not a "natural" state.