El presidente Obrador's letter implies as much, from the translations I have read. it reads, on part (translated):
"President Roosevelt was a titan of liberties. He proclaimed the four fundamental rights of humankind before anyone else: the right to freedom of speech, the right to freedom of religion, the right to live free from fear, and the right to live free from misery".
Additionally, Obrador argued that “universal justice” will triumph over national borders, saying: With all due respect, even though you have the right to express it, the slogan “America First” is a fallacy because until the end of time, even over national borders, universal justice and fraternity will prevail...
You could argue the Mexican President was advocating for illegal aliens. It's a matter of interpretation. Or Did I miss something?