Indoctrination is a real thing. Pretty interesting that you openly acknowledge that you are a product of the system and environment you were raised in. That means you also have the ability to change, to be more accepting of others than many people around you are -> so many people in your situation aren't even self aware enough to realize that their thoughts about others are the result of indoctrination by the people and systems around them.
So, decide to be better and bit by bit train yourself to be better to others. Question negative thoughts and emotions you have about others, stop them, replace them with tolerance, acceptance, curiosity -> get to know the people you've been conditioned to fear or "other," and think lesser of.
It can be hard work to do, and take time, but it can be done. I know that my thoughts about some people were trained into my head by others and at a time by a book, but over time I've been able to reverse that damage by consciously being aware of the negative thoughts of others when they came into my head, questioning them, forcing them out and replacing them with much more logical realistic perceptions. Rome wasn't built in a day, as they say.. so you can't just flip a switch and rid yourself of all indoctrination that you realize you don't truly agree with and don't believe is the way to live your life, think of, or treat others. It's more of a long term/lifetime commitment to continuous improvement, learning, growth etc - and you have the advantage of age being on your side, starting young at 18!! People like my father had certain attitudes in his 40's that he was able to correct in his 50's and 60's, But that's because he consciously decided to - certain types of jokes were no longer told or funny once society shifted and people learned they were in very poor taste. Other older people have much greater resistance to changing anything. At 18 you're still extremely mouldable and can adjust and adapt so much better than older people, so while it'll still take an effort, it'll be easier and faster to change your mindset to whatever you want it to be.
Oh, and one last thing.. while the West is certainly on average a lot more accepting of LGBT people, it is not some fairytale land of perfection. The USA has about 340 Million people. They're not all friendly to LGBT people - especially T people, and especially trans women of colour. (not white/caucasian) The gay rights movement in the USA was really kicked off by a black trans woman named Marsha P. Johnson who threw a brick at cops harassing the gay community during protests at Stonewall on June 28th 1969. Since then, gay white males get the most acceptance of all LGBT people, but even that isn't great in many cities and can be terrible in small towns. It's the safest in large coastal cities. Meanwhile, non whites and especially non white trans people have pretty abysmal times of life in comparison. The murder and suicide rates are through the roof. The average life expectancy of a black trans woman in the USA is 35 years of age -> because they die of suicide, drug overdoses due to escapism caused by lack of societal acceptance, and murder - because it's all too common, still, for cis gendered guys to freak out and murder a trans woman when they discover that she's trans. Still a very long way to go in terms of tolerance in the USA, never mind full and proper acceptance. So don't look West and assume that everyone has figured out how to live and let live - they haven't. They're a bit better overall, but not wonderful. That's why Pride protests & celebrations still exist - because progress still needs to be made in the USA, Canada, and of course in other countries where they have the death penalty for being LGBT.
One person at a time deciding not to be an a**hole towards LGBT people for existing is how those improvements get made. You turn, I guess. 
_________________
No

for supporting trump. Because doing so is deplorable.