I agree it's a bit of a stretch to think a sizable chunk of people from a particular country that's at war, their main goal in life is to live on the dole somewhere else. Basically very few people think like that, even the # of people on welfare, you ask how many of them are happy with that, and it's probably a small number. Having a decent paying job beats welfare for almost all people.
There's no particular reason to think that more e.g. Syrian refugees are born lazy than any other nationality. Hell, coming from a country with no history of welfare doesn't tend to breed people who view lazing around on welfare as a good thing. Y'know, because it's not a culturally ingrained concept that such a thing is acceptable or realistic. Generally people from poor countries have a cultural ethos that you work hard, or you don't eat, and have little tolerance for lazy people. That's an attitude you only start to have after moving to a rich country.
"They want our jobs" vs "They want our welfare". Those are contradictory.
Stick with the "they want our jobs" one. That one actually makes sense. These people want economic success, they're not travelling across continents because they want to become beggars. Hell, I've seen how hard asian immigrants work here. The real threat isn't that they suck up the welfare budget, it's that they make all the money and make the white European locals ashamed of being lazy fat bums.