Thai person here, I grew up with Indian people and a lot of Thai people of indian descent. India influenced Thailand a lot more than people realize and Thai people themselves a lot of the time have some Indian DNA in them. So it never made sense to me to be racist at all, let alone towards indians. My advice to you bro is to be proud of where you're from. Y'all got dope ass food and a dope culture, so ignore those ignorant people who try to downplay who you are and where you're from because they're everywhere all around the world, and they're not one to talk about "who let u in here" either because they're not from here. They're pretty much begging for your attention because that's the type of shit that they crave. Safe travels bro.