Okay so in Christian tradition today people get palms to "simulate" the time Jesus returned home. My question here is it was a desert. How did they got all those palms to recieve him in those times. I mean if in that area where enough palms to supposed do that.
The palms referred to in the Gospel narratives were probably date palms, which in fact were common in Judea at the time (and still grow there). Despite your impression, plenty of things grew there, and dates were cultivated. Palms were common enough that they were both (a) used by Jews as a symbol of nationalism, not least under the Maccabees, (b) used by Vespasian in depicting Judea as a conquered territory in coinage minted at the time.
See, for example Ze'Ev Safrai Nfa, Ze'ev Safrai's The Economy of Roman Palestine I.3.4 "Dates", on this.