“Another testimony is from St. Faustina.”
Yes, and Fatima is another famous and well documented one too.
Yes, Salvation is for All, However All will not be save as St. Leonard points out due to Freewill many choose not to follow but to make their own way down that wide path.
God Bless
Fatima is a demonic apparition calling itself Mary to deceive the gullible.
The so called promises that apparition made concerning the rosary are enough to show that it was NOT from God.