Is it normal to grow up gay because of your family relationships?

I grew up in an upper middle class, privileged and very old fashioned family. My father who I cannot name, a very handsome man, was a senior naval officer, my mother who must be anonymous too, didn't work after they got married and was physically lovely. They had five children of whom the first four were girls. I, a boy, was born after a gap of 7 years. They really wanted a male child but didn't bargain on getting the sort who arrived!
I was adored by my mother, sisters and a good number of female relatives whilst there were few adult men to whom I was close. Many were in the armed forces and therefore away a lot of the time and this included my father. Reportedly, I loved my dad, though to me he was always "Father", as my mum was "Mother" and looked forward to his coming home from the sea. We enjoyed each other's company and did a lot together, much of which was adventurous and outdoor but he also taught me woodwork and bee keeping. His love of nature in general and of wild birds in particular has rubbed off: I share the same interests. However I am fascinated by human health and disease and am a health care professional in the United Kingdom. To say more may be unwise in this context, hence I cannot tell you my exact profession. It may be useful to tell you that I love it, am good at it and am consequently widely respected, and well paid.
During my 'teens, my father and I began to diverge because he didn't share and didn't like my interest. I think he thought it morbid and frightening. He was a squeamish and curiously sensitive man given his profession, which involved killing people in time of war though of course that wasn't all of it. He was also a loner, and he hated socialising though you would never have guessed it because he was witty and very charming. I have told you already that he was good looking, being tall and dark as well as muscular and very fit. He loved women and they loved him. His relationships with men were less easy and variable in quality. There was a spectrum from very friendly and respectful through just okay to absolute hatred and despision. He had a 'good' war and was decorated with many medals. He was racist, probably homophobic, and a snob. Meanwhile he was also very artistic by temperament. He was a man of his time.
I was educated at an English public school and was a very clever child, with a love of learning. I was also personable. However I divided opinion among masters and boys and nothing has changed since! My masters either loved or loathed me, about 50/50. Boys did the same but by 95/5, where the larger figure represents real dislike. Consequently I was badly bullied for much of my time at school but survived because there were always had a few good friends.
My father understood and liked me less and less as I grew up. My brains challenged him, my arrogance upset him and my sharp tongue hurt him. Also I hated team sport, whilst he enjoyed it very much.
Matters came to a head after an argument in my fifteenth year, probably over religion or politics on which we profoundly differed. I was an atheist (though now I'm a heathen) and he was a staunch Tory - sort of like a Republican but with added class distinction. The Church of England has been called the Tory party at prayer!. He beat me up quite badly and I spent the rest of the day in tears, being half-comforted by my mother, who also (and astonishingly) saw things his way. I never forgave either of them. He died 7 years later, unmourned by myself. She went many years later and by then we had a very good relationship generally, though I believe there were reservations on her side as there certainly were on mine. She was unhappy that I identify as gay, though she liked my husband and once told her greatest friend that he was impossible to dislike (like she had tried hard!). Most other people feel the same about him, for he is a truly delightful man.
So am I gay owing to nature? I think an uncle who died in WW2 was probably sexually attracted to his own kind and strangely I am named for him. I was born in the mid 50's and thus never met that dashing airman.
Or is it nurture? See above.
And do I care? Well there's a question to which I can't give you a straight or simple answer…...