Hi!

Did you enable ip forwarding? echo 1 > /proc/sys/net/ipv4/ip_forward

You have to do it every time you want to use arp_spoof script. Also don’t use Bing as it uses hsts protection now a days, use a simple https ot http sites like winzip.com, stackoverflow.com, zsecurity.org, vulnweb.com, etc.

Greetings!
Diego