There was nothing divisive about Biden urging American's to get vaxxed, even if some Earls who are not community-minded and who allowed themselves to be politicized by Covid and the country's response to the health crisis perceived it that way in their ignorance. There was a global health crisis--a serious global health crisis. Huge numbers of people were dying and getting sick. But apparently because huge numbers of people weren't dying in rube-land, rubes didn't take the situation too seriously--and didn't want to. Health experts urged Americans to get vaccinated to keep from being hospitalized should they get the virus. The president was trying to protect the health of Americans during a crisis--and repeating what health experts were advising. Anybody who perceives a president trying to protect the health of America as being "divisive" is a deeply misguided fool.
If this is the best you've got to support your assertion of Biden being "divisive," you have nothing--and there is nothing. You'll find genuine divisiveness in the candidate from the other party---the gangster.