Israel is new. At the birth of every nation there is political nonsense that'll last until all the radicals are either dead or converted.
Well, the research is leaning towards being some sort of genetic trait but it is not conclusive yet.
Research also says we ate Neanderthals to extinction. Hot headed science has no insight in human development. According to every generic scientist, humans grow up without environmental factors so adults are what their genes tell them to be alone. Genes are created to ensure survival at greater odds, so why would any gene go rouge and make humans less likely to benefit their species by being attracted to their same gender? Horses breed with donkeys because they are easily confused by viable mates. Homosexuals became homosexuals by the same factors: environmental illusion as I like to call it.
That's not really how genetic variation works. Since genes themeslves don't have brains, they have no way of knowing at time of mutation whether they'll be beneficial to reproduction or not. If a gene doesn't improve survial, over time individuals that have this gene will be less likely to reproduce, thus not passing that mutation on. On the other hand, if the mutation helps survival, offspring will be more successful, they'll likely pass the gene on, etc. That's just basic evolutionary theory.
Read an interesting bit on this somewhere where somebody said "well, since homesexuality is a bad trait with regards to species survival, why hasn't it been selected out?". The couterpoint to this was that because of how religion and general society has demonized it so much, people who were homosexual still had kids and such. Therefore, the mutation survives in the species with a much higher occurence than it would have if we all were still cavemen. Kinda random point, but it made me think about how society screws with basic evolution.
Just think - genetically I have poor eyesight, which I inherited from my mom. If I didn't have my contacts/glasses, I'd probably be eaten by a tiger. Therefore my screwed up vision mutation doesn't decrease my chance of species reproduction anymore. Mutation gets passed on when 'normally' it probably wouldn't have. Depending on how dominant or recessive that trait is, I wonder if in 200 years, we'll all need glasses?