That has always been the case .
This report shows that 180 000 people marched in London in 2021 to show support for Palestinians and the latest march in London 2023 , post Hamas terror attack on Israel, just 100 000 people attended the march , which suggests that Palestinian support is on the decline after the terror attacks
https://www.theguardian.com/uk-news/2021/may/22/thousands-gather-in-london-for-palestine-solidarity-march