For UK citizens there is a petition to Parliament asking the UK Government to take action against the Israeli law authorising the death penalty for Palestinians. It already has 1
Over 86K signatures if it reaches 100K it will be debated in UK Parliament. Please sign

Petition: Urge Israeli Government to stop law allowing execution of Palestinian prisoners
The UK Government must act urgently to urge the Israeli Government to stop the proposed law which would permit the execution of Palestinian Prisoners, past, present and future.