And there are many conservatives who don't believe semi-automatic weapons should be allowed anywhere (duck hunters don't have to be concerned about the ducks shooting back).
And if you expect Texas alone to absorb the 2,000,000 folks who have come across the border in the last two years, you might not understand the need to dramatize the need for changed immigration policies, a procedure for equitable relocation and studies of how many immigrants can be absorbed by our health care system, schools, social services and the like. The US has never absorbed anywhere near the percentage of immigrants we are seeing today, neither during the period of the Irish famine, the Germanic principality issues of the post-Civil War era or the Italian diaspora of the early 20th Century.
By the way, it was colder in El Paso when the migrants were send to DC than it was in Arlington, VA at the same time. The point was that a metro area of less than 800,000 was unable to accommodate any more people and the national government has to have a plan to accommodate people they let in or, otherwise, limit the influx.
Anecdotal evidence: I have long-time friends who have farming and ranching in the Laredo, TX, border area and have done that for the last four or five generations. In the last two years, they could not grow crops and had to sell most of the cattle. The crops were being trampled or stolen if ripe and the cattle slaughtered and eaten right on their ranch. The family is well enough known to have city buildings, a school, several parks and monuments named after them.