Yes, politics is tribal. All the parties are the same.
Unless there is proportional representation (which there should be), I don't see where Labour's opposition is going to come from. I'd wager 99.99% of those who signed the 'silly' petition are Reform / Conservative voters or bots. But unless they form some kind of alliance I can't see them beating Labour in 2028/9, which is when the next election will be held.