SURE! -- if you only look at negative outcomes AND blame religion (not people or cultures) for them -- then SURE.
For instance -- if I look at certain minority groups who have a high level of crime and incarceration and then blame their high rate of crime and prison ON their ethnicity or race -- then YES I can use that to say "what's the point?"
But wouldn't I be a bigot and a racist and be completely missing the REAL reason?
They don't commit crimes at a higher rate then other populations BECAUSE they are a minority or part of that group.
So here are my thoughts on this question...
1) Utilitarian Perspective -- Doesn't this question kinda 'assume' a certain utilitarian viewpoint of religion? - That it is a created thing like a hammer or a stoplight and if it fails to serve a purpose, we should dispose of it, like junk? Doesn't the question assume that religion was only created for a purpose and if it no longer serves us any purpose we should get rid of it? The question seems to drip of a certain consumerism and materialistic view of the world. IF however, we question the consumerism and materialism that we've been raised with -- see beyond those views - then we may not even see religion in this way (as just another thing to discard)
2) Religion is not the cause of Homophobia. We see many religious cultures with many varying views on human sexuality. We can not say that homophobia is the result of religion, alone. A) Society developed along with religion - so there is no time to compare a cultures view of homosexuality before religion and then after religion. It is simply NOT how societies developed. From all signs - religion is kinda baked into human psyche. (more on that later) B) There have been societies where their predominant religion saw homosexuality as the only TRUE form of love -- love between 2 men was viewed as the purest kind of love in Roman culture. There are other cultures where their religion did not place as much stigma on homosexuality - so this blows your idea that religion creates homophobia out of the water. It would seem like there is a cultural component as well or at the very least that only SOME religions have prohibitions against homosexuality.
3) Homophobia label overused -- A lot of people over use the term homophobia. They mean it in a colloquial way to mean 'anyone who doesn't think homosexual sex acts are perfectly normal and good.' -- TRUE homophobia, like any 'phobia' is a fear of or extreme hostile reaction to homosexuals. If I merely disagree with certain sexual acts such as pedophilia or homosexuality or beastiality -- I am not phobic -- I disagree and think it is not proper.
So even in religions who place prohibitions on certain moral acts -- I have never found a single one that teaches phobia or hate. Individual people may have phobias or hate - but religions, do not.
4) Misunderstanding the Source -- I would argue that because things like hate, hypocrisy, division, and homophobia exist in equal measure (I'd argue MORE) outside of religion -- the entire idea that 'religion causes these things' -is either untrue OR at the very least, extremely suspect. It is MORE likely that these things exist within humankind and that religion is misused as a justification.
We can BOTH agree that IF a religion actually taught these things -- then we should condemn that religion. But not condemn ALL religions.
I think we can both agree that IF a person exhibits (true) homophobia, hate, or hypocrisy that they are NOT following the tenets of their religion. IF, however we could find in religion those teachings - then we could both condemn THAT.
RIGHT?
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Before you allow yourself to think that 'religion' (all religions) cause these things -- I'd encourage you to look a bit deeper into WHAT these religions ACTUALLY teach, what their doctrines are, what their core message is, and what the average believer of that religion ACTUALLY professes and does on a daily basis.
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Lastly, I would say that on the basis you just outlined, we could insert Government, Culture, and even Family Life itself -- because I see the very same things you dislike coming out of individual families, from certain cultures, and definitely from politics.