On grounds for divorce, Jews followed one of two main schools of thought in the time of Christ, Hillel or Shammai. Jesus trumped both schools, going all the way back to God's original intent for the human race:
Matthew 19
3 The Pharisees also came unto him, tempting him, and saying unto him, Is it lawful for a man to put away his wife for every cause?
4 And he answered and said unto them, Have ye not read, that he which made them at the beginning made them male and female,
5 And said, For this cause shall a man leave father and mother, and shall cleave to his wife: and they twain shall be one flesh?
6 Wherefore they are no more twain, but one flesh. What therefore God hath joined together, let not man put asunder.
So, yes, Jesus did address the homosexual issue. In trumping the Pharisees, in the process he also trumped the silly arguments of these defenders of homosexuality.
God instituted marraige between a man and woman, THIS is what "God hath joined together." No "man can put it asunder." No leftist religionist, no ruling of the SCOTUS.
Your point is such an important one. It frustrates me how few Christians point to this key passage when radicals say Jesus never said anyting about homosexuality. The scriptures contain an even stronger argument for marriage that I also never hear made.
The reason or cause for marriage is the difference of the sexes. The fact that we are different-- male and female is the purpose that drives marriage.
Same sex marriage is immediately and necessarily NOT DIVERSE. The idea that is somehow indicates diversity is absurd. It is the embodiment of sexism-- yet no one ever points this out.
The most sincere experience that the average person will access in regard to diversity is a lifelong relationship with someone of the opposite sex. Same sex marrige is the walling out of the opposite sex and deeming them irrelevant to God's purpose.
(The Palestinian terrorist regime is the crisis and Israel's fist is the answer.)