1. Where did my shia/sunni debate thread go?

It most likely was absorbed into The OFFICIAL Shia-Sunni (Debates) Thread. If you wish to continue your debate with likeminded individuals, we would recommend you make use of either the hybrid or threaded display mode (top right of thread/in user options in the user cp) to easily navigate the current topic of discussion within the thread.

2. So what kind of shia/sunni threads won't be eaten by the monster thread?

Civil discussions/queries on indepth topics with no name-calling or bile.

3. Where did my deobandi/barelwi thread go?

Please see:
http://www.sunniforum.com/forum/showthread.php?t=2799

It was therefore most likely absorbed into http://www.sunniforum.com/forum/showthread.php?t=4403

No bickering please.