Tolerating just a little bit of wrong (Anything of which Jesus disproves) is like allowing a rusty object to to puncture your skin. Tetanus only needs one opening to your system. Sin only needs one tolerant moment... from you. Being strict is not being intolerant of other people's beliefs. It is embracing what Jesus wants. In the song, by Stellar Kart, called Innocent a phrase goes like this:
I know why the good old days are gone 'cuz everyone just tolerates whats wrong.
I know why the good old days are gone every time I turn my TV on.
Sin can seep in without us noticing if we only tolerate it once! Stay strong. Be intolerant of wrong or anything Jesus would dislike.
But Jesus answered him, "Let it be so now, for thus it is fitting for us to fulfill all righteousness."