They are stuck in the matrix and don’t realize it. You have escaped and can see beyond their worldview. They have cognitive dissonance when you confront them with inconvenient facts. The rare person will reevaluate their beliefs but large majority won’t. It’s a fork in the road for them and most will take the direction they were already on and drift away from you. You will naturally gravitate towards others who have changed their perspective and gain new friends and allies. No need to feel bad or look back.