Apparently the Serbs involved there have realized some of the basic drivers for such public demonstration.
People who engage in serious deviant behavior may feel some personal shame and guilt due to their chosen behavior but, more than that, many feel frowned upon and isolated from the human mainstream due to their aberrant practices. That seems unavoidable, but the feeling is persistent and often pervasive. The alternative to ending their personal deviant practices (and thus maybe shame/guilt/isolation)is to somehow aspire for acceptance and strive to gain one form or another of acceptance.
Thus the carefully planned and executed programs aimed at gaining some public legitimacy - in more recent times through political clout and quasi legal remedies - with the apparent hope of gaining at least the perception of legitimacy. Most humans are willing to live and let live - to not make undue notice or noise about queer behavior. But, most free and wise humans will not tolerate being told what to think and what values to embrace - the "in your face" demands of aberrant types are, in the least, irritating.
Apparently those Serbs do not worship at the throne or "wokeness" as do other societies, nor have they abandoned their normative standards in order to appease some deviant minority. They are reacting just as the vast majority of normal human beings have reacted for all of recorded time.
