I have read that statement ( it includes flies too ) in a book written by an American and is anti-Saddam. But is that a real statement ?
Also, if Saddam really hated Iranians why did he support the MEK which was composed of Iranians ?
The statement is real. Also if I remember correctly, when the Baathist Iraqi regime executed a journalist of partly Iranian origin, one of Saddam's sons declared that this person ought to have been executed twice: once for being a spy and once more for being Iranian... You might also want to note that Saddam proceeded to expelling tens of thousands of Iraqis with Iranian ancestry (Persian-speakers as well as Faylis, which are basically a Lori-speaking group). Nearly the entire Iranian-Iraqi community was forced into exile in this way.
This is precisely why the MKO are practically unanimously considered as traitors by Iranians across the board regardless of political leanings, because they put themselves in the service of such a hostile regime. Due to their treason during the Iran-Iraq war, when they sided with the enemy, the MKO achieved to completely cut themselves off from Iranian society for all times - except for some fringes connected to them through family ties.
So yes, MKO are Iranians but also traitors... not just to the Islamic Republic but also to Iran herself for supporting a foreign aggressor which intended to illegally annex Iranian land and was holding an extremely anti-Iranian, oftentimes racist discourse.
You might agree that just because an organization is nominally on the left, it doesn't necessarily imply that it is respectable or that we should endorse it. The MKO for instance definitely went crazy a couple of years after the Islamic Revolution. And much of it has to do with the way they were organized internally (in a strongly hierarchical manner), coupled with the fact that their leaders took the worst decisions possible in the early 80's. And thus they definitely condemned themselves. There are also reports about their deceased chief Masoud Rajavi having been among the anonymous shills or turncoats clandestinely recruited by the shah's SAVAK, mentioned only by a code number in internal documents of that intelligence service. Knowing that SAVAK used to be directly linked to and had been co-founded by Mossad, the CIA and MI6.
The MKO terrorist cult, which martyred some 14.000 of their compatriots, often in savage ways (such as burning their victims from head to toe with gas welding torches, torturing them with irons before burying them alive and so on - all these cases are documented by photographic evidence), is a sensitive topic to Iranians. You will hardly ever encounter an MKO sympathizer in an Iranian online community save for the MKO's own websites. Another exception to this rule are MKO online propagandists dissimulating their membership and operating out of the CIA-sponsored camp the US regime set up for them in Albania.
Either way, the opportunism of this organization has been such that it rapidly turned into an asset for French, US, Isra"el"i and now Saudi intelligence. Honestly my friend, having gotten somewhat of a glimpse of your political orientation, I think I can safely say there's no objective reason for you to feel sympathy for the MKO - at least not the MKO of the early to mid-1980's onwards. Else you would not just be alienating every Iranian user on the forum, but also actually be well disposed towards a CIA- and Mossad-handled entity, which I'm sure is something you'd definitely not wish to do.