Popa
I don’t think the chozer lsuram is due to their incincerity at all. I think its because it is SO HARD for a ger to adjust to our lifestyle. Additionally and just as if not more importantly they require chizuk and require love and acceptance. Are they accepted? Are they befriended? Does anyone want to be meshadech with them? Does anyone bother being mekarev them and inviting them for Shabbosim and what not? Most geirim are looked at as weird and outsiders and trust me they feel the vibes. Its very hard to be a ger and the Torah commands us 36 times about being careful with geirim. But hey look at the sinas chinum out there so if we can’t love each other its no wonder we can’t love the geirim.