The first is the widespread belief in the wider community that 'only stupid people are Christians'. That's a claim that won't stand up to examination, though is often offered by those unwilling to engage with Christianity's claims
The second is the truth or otherwise of resurrection of Jesus. Lee Strobel was an investigative journalist. He investigated the claims about the event with that background, and ended up convinced that it did happen. His book - 'The case for Christ' - shows what led him to that belief. Given that he was working in his own area of expertise - evidence gathering - the fact that he ended up changing his belief is significant.
Your third point about other religions is well made. There are a lot of crazy beliefs out there. The quality of much that is offered as apologetics for Christianity is very poor. Yet the long term impact of Christianity is amazing, as agnostic Tom Holland found when he researched it for his book 'Dominion'; a comparison of our civilisation's morals with those of Rome and Greece is instructive.
May I suggest your participation on an 'Alpha' course - or the equivalent. On a good day they provide generous hospitality and a chance for intellectual conversation on religion with real people. Think of it as a challenge - to convince the leaders that they've made a serious error! https://www.alpha.org/what-is-... (Some churches offer something similar but with a different theological bent...)