Is the body of the deceased pure or impure?

Q: Is the body of the deceased, before giving ghusl, regarded as paak or napaak i.e. is the deceased body treated like a person in the state of hadath (i.e. if the water which touches the deceased’s body comes on to the person giving ghusl, the water will not be regarded as napaak and impure) or is the actual body of the deceased treated as something impure like an animal which dies a natural death is treated as impure (i.e. if the water which touches the deceased’s body comes on to the person giving ghusl, the water will be regarded as napaak and the person will have to cleanse his body of that water)?

Participating in a protest for Palestine

Q: Are you aware on 9th August 2025 there will be protest in London only if 500 people sign up for it. This protest is there to deprescribe Palestine action as terrorist group. As Muslims, will it be considered jihad if we participate in this protest? There is chance of you getting arrested if you join. Do you think we as Muslims should join this protest? 

Also, they said we can only have signs that has below message nothing else as you can easily be targeted by police if you have different messages compared to masses. Only message they allow is "I oppose genocide" "We support Palestine action" 

Palestine action is a group that damaged elbit system sites in UK. Elbit systems supply weapons to Israel. UK government has banned Palestine action and there will be many protests like these to try and get Palestine action unbanned. Is it jihad if Muslims participate in these protests?