Just look at what happened with Ronald Reagan's (God bless him) temporary status for El Salvadorans. They NEVER WENT BACK. So much for "temporary". Not only did they never return, they brought America the "gift" of MS-13, and human trafficking, and child sex, and drugs of every flavor. In general, the mestizo South Americans are bad news.
The USA has benefited greatly from two groups of refugees to which we have granted haven, the Cubans and the Vietnamese. Both have assimilated well into the economy because they come from places where the government was a very unpleasant entity. Both groups also have some unpleasant memories of the previous governments and are focused away from government as the solution to anything. Both groups have generally shunned welfare. The Venezuelans might well be the same sort of people. Unfortunately their grandchildren have assimilated too well, having gone to our Communist universities, and many of that generation are Democrats but not yet more than a small minority.