Just a thought iddee.....which countries were the three who were born in the US to go back to? The other one was twelve when she arrived in the US presumably having not much choice in the matter. What does this say about other immigrants to the US who could very well be RW and successful? Is he saying they should go back to the countries they came from and not return until they had "sorted them out" No he's not, he is just using racist division to enhance his credentials with the gullible RW sheeples who believe what they are fed. The 'give me a funny hat so I don't have to think' sheeple. 
cider
I suspect you are getting the European filtered view of these 4 women. Should we have left Omar in Somalia? What might her life be like if we had? Do you think it would look anything like the life she now has? Yet she blames the US for everything all over the world and supports terrorists.
Talib hyphenates her ethnicity as Palsetinian-American. Like most who hyphenate, she seems to have her heart with the ID of the people who are other than American. She is anti-Semitic, and at best, a true socialist. I suspect after listening to her, she's actually communist. Regardless, she seems to hate this country. Yes, she was born here, but if she IDs so strongly with the Palestinians, I am sure they would love to have her.
AOC does not deserve further comment. She's just entertaining and keeping the Dems on their heals. The 4th seems to be a bit of a hanger-on.
The comment was not so different than what has been said multiple times over the decades to many people. If you do not like it here, or you think we are the problem, go where you will like it better.
The suggestion is not racist, or sexist. BUT, when you have people who can use those accusations, they will. It's automatic and most of us are done with it. We know it for what it is, but we just don't care anymore.
Also note that when Trump made the original comments he did not even mention their names.
Cider, how impressed would you be if every time you and I disagreed I screamed SEXIST at you?

would you be happy to have people in your government who seem to hate your country?