What is wrong with this sentence?
If you cause any trouble to him, I’ll not tolerate that.
What is wrong with this sentence?
If you cause any trouble to him, I’ll not tolerate that.
I think the problem is with cause. You don't cause something to someone, you cause someone something (like trouble or harm), or cause something for someone. You could either say:
If you cause him any trouble,
Or:
If you cause any trouble for him,
Check out the different uses and more examples in these dictionaries:
Your sentence has contradictory tenses.
I'll not tolerate any trouble you'll cause to him. (this sounds proper)