I don’t think banning meat will ever happen. Thats not really how that usually works. Though it will get more expensive. And actually currently the meat industry is heavily supported by governments to keep meat cheap enough for poorer people.

And we won’t solve climate change just with eating insects in the same way we won’t solve social justice issues just with keeping meat prices low.

We need to do multiple things at the same time. Finding and developing good food options, that are not as taxing at the climate as meat (especially cattle) is one good step, while doing other things against climate change. And we can work towards social justice by heavily taxing the rich, using that money to fund public goods and services mostly used by the workers.

Eating meat vs insect based products is not the socialist hill to die on, I think. There are better ones.