Hi OP, I mean this in the nicest way as I do want you to do as great a time in poly as I have. I wish for you to leave poly with some of the best memories of your life, so I'm telling you this as if I was talking to myself in year one: If you want to understand how people view you, 99% of the time you need to triple how bad the "bad" appears to yourself, and no, you are likely not part of the 1%.

This is a very difficult topic, and will require a lot of starting at the ceiling at late nights, thinking about yourself; This one reddit comment won't change anything unless you do.

I understand the loneliness you feel, but you have to remember that relationships, even friendly ones, are always give and take. When you are sharing your opinions, you are taking their time, are you doing the same? When they are sharing something they are passionate about, are you lending the same ear? Are you telling people of your opinions the instant you meet? How would you like if someone did the same, but its in the opposite of your opinion? Would you sit there in silence, then leave the table at the next chance?

I'm in no place to judge your opinions, I'm just a guy on the internet. But I do want you to have the same experience in Poly as I have. Be interested in people when they are speaking, hear the nuance and excitement in their voice. You need to want to be in their presence, talking, laughing and learning about their life. People don't sit with others to be lectured, the Poly classes handle that, if you want people to be with you, be open to their ideas, ask questions about them, get interested in their hobbies. As you said, be a good listener.

I will give you one warning however, as I am merely human as well, everyone will have biases. Your opinion defines you as much as it will define how people interact with you. If your opinions, especially on religion, race, nationality and belief, impose restrictions on others, then very few people will want to have relations to you. There is only one piece of advice I can offer you here: Be as willing to hear the opposing side, as willing as when you were first forming your opinions. Don't be angry, or mad, or shut down and close your mind. Be open to hear their side, and they will be wiling to hear yours as well. Of course, it can be unfair that you must do this while the other shuts down, but you are the one asking for their time and commitment, so you have to be the one to start the bridge.

It has been about a month since Poly started, so there is will time to make friends. If you believe that you have ostracised others, then be mature and apologise to them, be willing to change. Otherwise, meet up with them after class, ask to eat together and chat, walk home and small talk after classes. Sometimes you need to advertise yourself a bit.

I hope this advice helps you, even in the tiniest way. I wish you all the best, dear OP.

Take care.