Let’s not “both sides” his behavior. This president lies about everything, and actively causes harm by lying maliciously about people he would like his followers to target.

I'm not "both sides"-ing it. Presidents all lie frequently, I'd argue they lie about most things. Without knowing what the truth actually is we would have no way of knowing who lies more, and at the end of the day my concern is with them lying at all rather than to what degree they lie to the public.