But he isn't be reasonable. He is painting a bunch of people who just don't want to live in a wartorn shithole anymore, where if they stay they are likely to get murdered by rampaging fanatics, as an invading army by associating them with the very rampaging fanatics they are fleeing from.
It claims that granting asylum to the weak is someone itself a weakness, and places such nebulous ghosts as 'heritage' and 'culture' as not just being under thread, but more important than hundreds of thousands of human lives.
It claims that America is under attack and falling apart, when America is still the world's leading superpower.
It creates a sense of fear out of smoke and mirrors, playing on hatred and promising protection (from an imaginary threat) and revenge (against an 'enemy' that likely doesn't even know you exist) to create a group hanging on your every word and willing to do whatever you say.
This is basic fearmongering tactics. This is how fascist movements and cult leaders rise to power. Always has been, always will be.
Don't feel too ashamed if you fell for it. Human history is full of people like you. Its really easy to get gaslight by fear, thats why people who want power over you keep doing it.