Confusion! Who needs it?
If we ponder a bit on the situation then we'll find that the key reason to this problem is the Freedom itself. Every one has right to be free. So, a homosexual thinks that the system must ensure homosexuality according to its creed. On the other hand an anti-homosexual watches it as a violation of civil right. According to the belief of 'freedom' both of them are right and should be given 'green light'! Here comes the second story!!! The approval of homosexuality violates the 'freedom' of anti-homosexuals and disapproval of homosexuality or same sex marriage violates the 'freedom' of homosexuals. At this juncture human beings are confused and need a way out of it.
Mr. Omar also mentioned that since there isn't any scientific evidence to support statements such as 'same sex marriages are contradictory to the notion of procreation of human race' and 'homosexual acts must be considered wrong because they close the sexual act to the gift of life.' Here I'd rather leave a little advice for Mr. Omar: Please do not take decision fully depending on science all the time. The fact is by using science and technologies we can enhance the lifestyle of our own, but they themselves don't tell or guide us how to use them; rather, it's the idea or a creed that a man will possess. It could be capitalism, the belief of freedom, communism or Islam. We have to keep in mind that our life is not constant, the scientific discoveries and inventions are only encountered by this process of life. So, its fruitless and impossible for a life to become static and depending only on scientific discoveries or inventions. It's for certain that a life needs a way of life and science certainly is not a way of life.
On talking about the atheists, I suppose Mr. Omar forgot the large number of the religious people (majority) here. As far as marriages of atheists are concerned, an atheist has various option to get married and no one will be blaming him for it. But, if he/she does not have a mind to get married but indulge him or herself in perversion then the system of the society will prevent him from contaminating the elements of the society. One of the important point I want to raise here is that an atheist and a religious person can share the same economy whether it's capitalism or Islamic economic system, and not a single atheist finds difficulties dealing with it and it is evident in Bangladesh. So where does the problem stand? Basically, a non-conformist can never become a conformist unless he starts thinking in an unbiased manner.
When there is a complete division in the western world whether they'll allow the same sex marriage or not, we realised it because they chose a way of life which cannot give solution to this problem where as Islam gives it.