I fail to understand why people object so much to enforcing border policies now days. I feel bad for any children impacted, but their parents chose to illegall

I fail to understand why people object so much to enforcing border policies now days. I feel bad for any children impacted, but their parents chose to illegally immigrate. It sucks they are punished for it, but enforcing the law to preserve the way of life for its legal citizens should be a governments top priority. Legal immigration options exist, and legal immigrantz amd refugees should be welcomed with open arms. But if you don't take those options or don't meet the criteria you can't complain you aren't able to stay.