I see two. This may be a good reminder of forum policy, so although I wasn't involved, I'll outline the two rationales (as I personally see them) for the deletions:
First: "+1" and "^this", by themselves, and with no additional commentary, are frowned upon as content-free posts.
Second: There was a thread where the original post mentioned Islamic fanaticism, leading to several more posts about religion. Almost all of the subsequent posts that dealt with religion were removed, and the thread was closed. Religious discussions almost always turn into messes. TFL's staff don't like dealing with such threads, so they are usually nipped in the bud.
“The egg hatched...” “...the egg hatched... and a hundred baby spiders came out...”
“Who are you?” “A friend. I'm here to prevent you from making a mistake.” “You have no idea what I'm doing here, friend.” “In specific terms, no, but I swore an oath to protect the world...”
“It's a goal you won't understand until later. Your job is to make sure he doesn't achieve the goal.”