Refutations of his other lies are not hard to find.

You are correct. It is easy to find tons of lies. Not just about him. Russian hacking. (bullshit) Russia, Russia, Russia. Gas attack on the UK with gas by Russians 10x deadlier than VX gas yet no one died. (obvious joke of a lie)

Everytime we're about to back out of Syria... suddenly Assad magically allegedly gas attacks people. When he is winning, and suddenly we have an excuse to be there and to strike. Assad must be secretly suicidal and be sad his death is about to be averted, so he must do something incredibly stupid (not once, but multiple times) to get our guns pointed back at him.

These are the stories that are "not hard to find".

That doesn't make them true.

If everyone on the planet believed a lie, it would still be a lie.

If no one on the planet believed the truth, it would still be the truth.