This submitmj guy does not want to talk about their namaz, it is because of the amount messing up they have done with this prayer, just because it is not mentioned fully in Quran. Namaz is an excellent example of why we need sunnat to perform it properly.
It is interesting that these munkireen e hadith consider ruku3 to be a part of namaz, even though Quran CLEARLY talks about Namaz/Salat and Ruku3 as separate ibadat/prayers. Hence Quran talks about 'aqeemus salat wa aatuz zakat, war ka3u ma3ar raki3een'. So in such aayats, Quran talks of Salat, Zakat, and RUKU3 seperately; thereby meaning that these are three SEPARATE ibadat!
What do munkireen e hadith/sunnat say about it? Is ruku3 a prayer different from salat? Why not? If salat and ruku3 are mentioned separately then they should be separate prayers.
You must be careful when interpreting the Quran linguistically. This is because the Quran uses variant languages when addressing issues. i have seen many people do that and end up being contradictory. Its always best to interpret the Quran based on context and cross referencing with the rest of the Quran.
I like to interpret the Quran by meaning and context and look at the rest of the Quran to get an understanding. The Quran is not a normal book and its use of language is unique. This is the same mistake Sunnis do when they seperate God from messenger or the Quran from wisdom. They end up contradicting themselves since to obey God and His messenger can only bepossible if there is agreement between the two and not contradiction. Thats why Sunnis say the Sunnah abrogates the Quran, this way they end up following the Sunnah but not the Quran. You can't follow two contradictory injunctions so they end up abandoning the Quran. And thats not cool.