At any rate, the Supreme Court has the responsibility to uphold the constitution. In making the ruling they did, they upheld the "equal protection under the law" part of the Constitution. If people don't like the laws, they need to change them. To expect the Supreme Court to rule differently than they did would be expecting them to be "activist" judges, and right wrongs that can only be corrected through legislation.

Seems to me people who style themselves as "conservative" would understand this and support it.