I support England players taking the knee.

It's unfortunate that a minority of football fans have booed the national team doing this at recent games. Gareth Southgate, the (white), England coach has come out in support of his players in an open letter to fans:

https://www.theplayerstribune.com/posts/dear-england-gareth-southgate-euros-soccer

All the other England players are completely on board. We live in a multi-racial country and the national team of our dominant sport is especially so. If the England players want to take the knee, then people should support them. For me, as a white football fan, it's about listening and showing respect to the experiences that minority people go through.

If people boo players who take a stand against racism, then that is showing a lack of respect.