There are ways to show that you are different without making it look like you’re better than everyone else. You can respect others, and tell them that my religion doesn’t allow certain things. I would certainly not do it in a way that makes it look like you’re being rude.
I would advise you to look into Sefer Mekadshei Shemecha, by Rabbi Shraga Freedman, available through Feldheim. I personally know the author. He researched the topic of Kiddush Hashem for 10 years and he has haskamos from Rabbis Shmuel Kamenetzky Shlita, Yitzchak Sheiner Shlita and others. This sefer talks all about the importance of making a kiddush Hashem and how to do it.