Whether there are any superstitions within Christianity depends on your definition of superstition.
Some see all religion as superstition and on that view Christianity is, in its entirety, superstition.
The ancient Romans did not regard their own religion as a form of superstition, but when Christianity came to their attention, the authorities labelled it superstitio - a superstition, again in its entirety.
Fear of the devil and of demons is consistent with superstition, and rituals of exorcism can be called superstitions. Similarly, the earlier Christian belief in witches was a form of superstition.
Veneration of saints was controversial in early times, as some Christians saw this as akin to polytheism. An alternative view is that it is akin to superstition.
Veneration of supposed relics of saints is really no different to what we mean by superstition.
Belief in apparitions of the virgin Mary is arguably a form of superstition, as is belief that certain places are associated with healing miracles.
There are no Buddhist superstitions although individuals may have their own private superstitions as in any religion.
No, iconoclasm is not restricted to Christianity by any means. By definition, it is a deliberate destruction within the religious icons and beliefs of any culture - not just Christianity.
not really
While there are certainly historical, anthropological and cultural reasons behind most superstitions, they are called superstitions because of the very fact that they have no basis in Science.
Within Christianity all people are just considered children of God, thus there are no "social classes" within Christianity.
There are various superstitions concerning eye color. For example, people with blue eyes are said to be full of energy.
Christianity is not about suffering, but of healing.
No. Superstitions are not scientific in any way whatsoever.
There are any number of sources for information on superstitions and their origins. I keep a Cassell's Dictionary of Superstitions, by my desk for quick reference, but have several other volumes for more in depth research.
Most superstitions have formed, over the years, through myths, legends, folklore, and religion, and do not typically have any real scientific basis.
There are many superstitions regarding dragonflies in folk culture. Many people believe that the presence of a dragonfly means good luck.
You should not believe in Superstitions. Superstitions is the product of ignorance among people. Many superstitions are not true.