Incidents at Premier League matches on Sunday show "hate is alive and well within football", says anti-racism charity Kick it Out.
Striker Ivan Toney and full-back Rico Henry made the allegations after the Bees' 3-2 victory.
It came hours after two Burnley fans were arrested for "discriminatory gestures" during Tottenham's 1-0 win.
The Metropolitan Police said the men were ejected from the Clarets' section of the Tottenham Hotspur Stadium on suspicion of a racially aggravated public order offence.
"We have been made aware of a spate of new alleged anti-Semitic and racist comments and gestures linked to several clubs over the weekend," said Kick It Out's head of player engagement Troy Townsend.