Translation:What is the cause of the fantastic international relations with Ireland?
https://en.wikipedia.org/wiki/Same-sex_marriage_in_the_Netherlands In 2001 already, as the first country in the world
That's not quite true. There was a lack of will amongst the Irish political class to legislate for equality. However, there'd been plenty of support for quite a long time, leading to 62% voting Yes in the referendum, which is a substantial margin. Ireland was the first country to legalise it via a popular vote rather than via legislation, which is what the Netherlands did.
Ireland hasn't been all that religious for quite some time.
There was a lack of will amongst the Irish political class to take any heat for implementing this by legislation, since in any case it seemed fairly certain to pass by referendum. In Ireland recent govts tend not to act on divisive social issues by legislating first, mindful of the very divisive divorce and abortion campaigns of 1986 and 1992. Those sort of issues they put to a referendum. [see https://en.wikipedia.org/wiki/List_of_failed_amendments_to_the_Constitution_of_Ireland]
Ireland hasn't been that religious for a couple of decades. Those two campaigns accelerated parties, particularly Fianna Fail, splitting from religious-conservative voters.
Wow, I don't know if Alex is your brother Alex, but I do know that if you don't know whether Alex is your brother Alex, then your brother Alex probably doesn't want you to know what he is doing all that much, considering that he hasn't told you about the Irish language course that he has single handedly developed in his spare time away from pokemon and whatnot or whatever the kids are doing these days.... I for one suggest you take a greater interest what your brothers are up to!