Regarding the first video, some have been quick to call it fake news on the grounds that the Dutch have said that the suspect was not a migrant but was born in the country. However, that says nothing of his background; he could have been born to migrants, and many European countries have similar issues with 2nd generation migrants as with 1st generation migrants.
Furthermore, while some have claimed that he was not a muslim, the Dutch authorities have made no such statement, as they don't comment on the religion of suspects; BBC notes that "The religion of the perpetrator is unknown".
Exactly.
Exactly... what? Trump doesn't know the answer to those two questions either, and yet he posted the video to spread hateful propaganda.