The world can be changed one relationship at a time.
Or are they jealous of mankind because of that which Allah of His bounty hath bestowed upon them? For We bestowed upon the house of Abraham (of old) the Scripture and wisdom, and We bestowed on them a mighty kingdom. - al Quran 4:54
Personally, I'm sympathetic to the cleric's position. I do not like commercialized holidays. And I agree with the idea that unmarried people should be focused on getting married rather than engaging in romantic flirtations with people they're not married to.