safer to snip off the thorns once the thorns have hardened(turned red/brown). Thorns usually start green and succulent and cutting them while green may cause problems, being open wounds. Jujus generally get less thorny with age and height. The higher the branches are borne, the less spines. Tiny suckers/seedlings are often spiny-- maybe nature’s way of defending against would-be grazers.
btw, i hope the seedlings from ebay were chinese jujubes(Ziziphus jujuba), as there are many species of jujube seeds being sold online. There’s probably no ill will with the business. It is just that juju seed importation involve multi-sources/subcontractors who are merely clueless, so mistakes occur all the time. If you are handy with uploading photos, pls feel free to post as many photos on this thread so we can do a positive identification. Any species other than jujuba would set you back ~2 years of waiting, and that would be so demoralizing!
keep us posted!