Asylum seekers are supposed to stop in the first country available. Mexico grants people asylum. So you should ask yourself, why aren't they applying there? Because they aren't fleeing imminent physical danger, that's why. They are abusing the system to cover being economic migrants, and they are assisted in this by NGOs with questionable motives.[1][2][3]

People who cross national borders, without documentation, and not at designated points of entry, are NOT "immigrants". They are illegal aliens. People need to stop conflating the two.

[1]https://www.bbc.com/news/world-us-canada-48548031

[2]https://www.washingtonpost.com/world/the_americas/as-trump-t...

[3]https://www.youtube.com/watch?v=mJlOmMj21uM