Yes his words are wrong but the Mexican government launched those canisters not us. And what are you talking about in regards to Syria/Russia??
They have nothing to do with our border but if you’re referring to those “ gas attacks “ like the one that was supposed to ignite an Arab spring in Syria but in all actuality it was proven that it was done by insurgents.

As well as the other two attacks one of which Tulsi Gabbard and several other lawmakers went into the exact area where it supposedly happened and talked with actual citizens who claimed that until they watched the news they weren’t even aware of such a thing happening where they lived.

But before I go may I ask are you aware that there was an agreement between these people and the Mexican government to wait until they could be processed before crossing the border? So they knew that they would be met with resistance.