The purpose is to measure the effect of a single variable, so you make sure to correct for all other variables. For example, to measure the effect of height you might compare white men only against white men, black women only against black women, etc.
In a study measuring the gender pay gap, they would be correcting for variables other than gender.
Houthi Rebels
They are the government.
"Hitler is basically the German Trump"
universally reviled in the Middle East
He is literally a phophet in the Quran.
I'm also trying to fit a SodaStream in my budget if I can
Israeli company that treats Palestinians like shit on stolen land, should be boycotted.
The PFLP has boycotted the PLO for almost a decade, does operate in Gaza, and is participating in the current hostilities.
"Israel only accidentally commits genocide and ethnic cleansing. Hamas deliberately killed soldiers and settlers!"
It's actually worse, I think he's telling a black man that the police killings that led to BLM were "tragic inadvertent loss of life". 
I think it's a weak argument with the Uighur genocide to point to increasing population, but to be fair the full argument is that the population is increasing AND there's no refugee crisis AND there's literally no evidence of genocide at all that wasn't just the made up ramblings of Adrian Zenz.
would probably end up being a marginally better actress
So would an actual wooden plank.
Social Democracy.
Yes, that's what it means - if all other factors they list are equal, meaning if the only difference is height.