i'm confusing rite now!!

ak try view discussion kt ba'alawi..da' title is "PERKAHWINAN ANTARA SYED DAN SHARIFAH" its sound menarik..but after ak bca...its made me a bit..or myb a lotz..confusing..huhuhu..ak xtau np....org kta haram if sharifah or syed memutuskn nasab (Sharifah xkawen ngn Syed or vice versa)..so..tok xmemeningkn ak..ak try tnya one of ba'alawi's member...dia kta mmg de hadis y related wit hukum memutuskn nasab neh..lg2 buku ttg ahlul bait....huuhuhuhu..but ak still with my stand..myb its thier own opinion..n i dont think its haram...if yes...why ulama' or bahagian yang uruskan perkahwinan orang islam ni...allowed marriage with non-syed?....if it is haram...ulama' shud know about it right?.n they shud explain to people..but why there's no words comes from them saying that it is haram?....(i mean in malaysia)........n for me..as long as xde lg hukum y kata haram dlm Al-quran or even Al-hadith..its ok..rite?? sbb 2 y wajib n harus kite pegang kn?? (^_^) yeah...speak it's loud ESTEE!!