Your claim is "when Obama said he was against gay marriage before he was elected and said he was for gay marriage after he was elected?" -- it's either sadly ignorant or purposefully disingenuous
'Marriage' vs 'Civil Unions' vs 'Gay Civil Rights'
When Howard Dean was Governor [ in 2000, after the Vermont Supreme Court, in
Baker v. State, ruled that the state's marriage laws unconstitutionally excluded
same-sex couples and ordered that the state legislature either allow gays and lesbians to marry or create a parallel status. Facing calls to amend the state constitution to prohibit either option, Dean chose to support the latter one, and signed the nation's first
civil unions legislation into law ] - was Dean against gay marriage?
Massachusetts CJ. Margaret Marshall in 2003 [ Marshall wrote the ground-breaking decision in
Goodridge v. Department of Public Health that declared that the Massachusetts constitution does not permit the state to deny citizens the right to
same-sex marriage ] - lots of gay advocates first misunderstood the ruling, mistakenly believing that the CJ was opining the door to the Vermont solution for gay 'marriages' They were wrong. But were they anti gay marriage because they were calling for civil,unions and not gay marriage?
You insinuate that Obama lied and changed his position after he was elected, as if that would help him. Help him how?
Many people got suck on defintion(s) of Marriage and brought religious arguments to a basically civil status. One can get married in a house of worship, but for tax and other purposes of government benefits, a civil marriage license is needed. People who were arguing against marriages for gays, were not all on the same page. Some were anti gay. Some were stuck on the religious nod to marriages. Others still were stuck on a marriage having to be for the purposes of producing children . I could go on...
Your premises lack real world arguments and resolutions of the issue. You paint a black and white picture, lacking obvious gray areas. You ignore many people's opinions and even beliefs evolve over time.
Then there is your obvious dislike and maybe hatred of Obama