You miss the point. You're the one making the claim. If others choose to attempt to refute it, they're at a huge disadvantage, because you cannot prove a negative. The only way to prove these are fake would be to compare them to all his tweets, in total! That burden of proof does not exist for the person questioning your meme's claim.
You, on the other hand, as the person who made the meme, have every right to *not* provide any source details. However, once someone challenges you on the veracity of your meme, it's up to you to either cite the source, or suck it up and admit that you either can't, or wont... which means in the game of proving right or wrong, you would lose.
