So, we have proof of a strong algorithm manipulation by Israel on the entire family of main US social media (those used by the older segment of the population); and yet you still manage to point your finger to a hypothetical, unproved manipulation of the algorithm on the competitors' social media to explain the difference in attitude between generations? But you have the answer here, there has been manipulation of the social media consumed by the older segment!
The proof is supplied by the article: "Multiple independent sources inside Meta confirmed the authenticity of the information provided by the whistleblowers. The data also show that Meta removed over 90,000 posts to comply with TDRs submitted by the Israeli government in an average of 30 seconds." 90k take-down requests in 18 months is quite a lot.