You are using the very deceptive trick that I mentioned in my post.  You are taking specific clauses of a big agreement out of their context.  The tariff rates you quote are after quotas are exceeded and/or are to counter markets that the US subsidizes (which effectively amounts to the same as a tariff).  If Trump thinks the US is treated unfairly (and if he does, why did he sign the agreement in 2018?), why does he not just start discussions to renegotiate the agreement instead of adding a blanket 25% tariff without any attempt at negotiation?  He is trying to intimidate and weaken Canada so that he can take part of it.  It is an attack, not a negotiation.