What I'm gonna say may sound corny but please hear me out.

Fight fire with water.

Think global, act local.

They are spreading hate, ignorance and fear. Spread love, knowledge and courage instead.

Don't seek conflicts, seek compromise.

Avoid giving your money to Them. Buy local, buy sustainable and organic things.

A good rule of thumb is if it's all or mostly made by God, it's probably all or mostly good. If Man gave too much of a hand, consider another brand.

Try to opt out of as many of their systems as possible, whenever possible.

Can you grow your food? Can you trade your labor or services for someone else's rather than using fiat money?

Can you make your own clothing?

Can you make anything instead of buying it?

Can you recycle and buy second hand and goods made from recycled materials?

The more caring your community is of its members and "neighbours", the more knowledge you share and the more selfsustainable it is, the greater your power over Them is.

...whoever They may be ;)