The locusts should be a problem for those who don’t have a mesorah on it.
When it comes to Kashruth,w e generally hold that if one frum jew holds something is Kosher, you can eat it. There are a few animals which arent regulary eaten (Like a Giraffe)
The issue with locusts is most of us are disgusted by it and I think I heard somewhere that is the real issue. Eating something we are disgusted by.