There's no nicer way to say this but...

[kılıç_mehmet]

It is about patriotism. You are protecting your culture, beliefs and country. You have made mention of it several times.

Well, I speak of things that are not exclusive to my culture, however.
I already know that such things cannot find a place within my own society, I do not need to protect it, as I do not see a visible threat that could come in the form of publicizing homosexuality, at least yet.

I don't think marriage equality is destructive.

Marriage equality is a wrong word to use. Marriage equality, for me, is equality within marriage.
Not equality for straight people and other sexual minorities. Equality is only amongst equals for that regard. How could the marriage of two straight people equal the marriage of two guys or gals, who cannot even perform the basic tasks that marriage actually endorses, like having children and creating a family, without external help from others? Marriage has been exclusively for a man and a woman only. That is why parties are known as "husband and wife", "Mr. and Mrs." "Bay ve Bayan" in Turkish. There are limits to everything, Shell. You cannot extend things to encompass everyone.
If you do, it will burst after a while. If you can fit 20 liters of water into a tank, you fill it with no more than 20 liters.
You have to use a seperate tank for it.
Similarly, gays can obviously have a seperate existence in terms of the economical benefits that marrige grants, but marriage has it's firm definitions.
It's not exclusive to us, the Turks, or Turkish culture. It's the same for the Russians, it's the same for the Japanese, the Chinese, the Arabs, Persians, Greeks, Lithuanians and etc.

However, I agree that it might be in your country.

If the lawmakers, one day, suddenly decide to make it legal, then it's legal.
What can I do? Really? Besides, I do not advocate anarchy and vigilantism, unless the integrity of the nation is under immidiate, serious threat, such as an enemy invasion, under which I'm obliged to attack the enemy, even if I'm told to remain inside by either our or the enemy authorities.

But the concept of marriage can be saved by simply taking care of it as a nation. It's not that the only knife plunged into marriage is the newly suggested concept that homosexuals should be allowed to marry.
I also oppose the notion that people should have children outside of marriage, or live together for years and years without getting married. These are all, equally destructive for society.

In my country, it would give people equal rights and piss off people who it would not affect in the slightest.

Well, Shell, you might think so, but your grandchildren might think differently after seeing how social values have degraded to a point where there is no return.

People like them have been pissed off before.

Obviously, but as I said, you can stretch things to a certain point. Frogs can only leap about this high. No higher.