Censor professionem facilem dictu putat, quasi omnia vera sint.

Because it is the thing that censor is thinking about or judging.

With putat, Latin often uses a construction like:

• aliquid facile putat = he thinks something easy
• aliquem stultum putat = he thinks someone foolish

So here:

• professionem = the claim/declaration
• facilem dictu = easy to say

Together: he considers the claim easy to say.

You can also mentally expand it as professionem facilem dictu esse putat, but Latin does not need the esse here.

Probably not in the modern English sense of job or career.

Latin professio, professionis often means something like:

• declaration
• statement
• claim
• public profession

So in this sentence, professionem is more like a claim or a declaration, not an occupation.

Because facilem is an adjective agreeing with professionem.

• professionem is feminine singular accusative
• facilem is also feminine singular accusative

So facilem describes professionem:
the claim is easy

If Latin used facile, that would be an adverb, meaning easily, which is not what is happening here.

Dictu is the supine in -u of dico.

This is a special verbal form that commonly appears with adjectives such as:

• facilis = easy
• difficilis = difficult
• mirabilis = amazing
• horribilis = dreadful

So:

• facilis dictu = easy to say
• difficilis factu = hard to do

In this sentence, facilem dictu means easy to say or easy to state.

Yes, that is the most natural way to understand it.

Latin often uses adjective + supine in -u where English uses:

• easy to say
• hard to do
• wonderful to behold

So professionem facilem dictu is literally something like:

• a claim easy in saying

but in normal English:

• a claim easy to make
• a claim easy to say

You can think of one if it helps, but you do not have to.

Two useful ways to understand the structure are:

1. Predicate accusative/complement with putat

   • He considers the claim easy to say

2. Expanded with an understood esse

   • He thinks the claim to be easy to say

So yes, many learners find it helpful to supply esse mentally, but the sentence works fine without actually writing it.

Quasi means as if or as though.

It introduces a clause that gives the attitude or appearance behind the statement. Here it suggests something like:

• as if everything were true
• as though all of it were true

That often carries a skeptical tone: the speaker is implying that not everything really is true.

Because quasi commonly introduces a subjunctive clause.

• sunt = indicative, are
• sint = present subjunctive, were / should be / may be, depending on context

After quasi, Latin usually uses the subjunctive because the clause is not being stated as a plain fact. It is presented as something supposed, imagined, or only seeming to be the case:

• quasi omnia vera sint = as if everything were true

Because they agree with each other.

• omnia = all things, everything
• vera = true

Both are neuter plural nominative because omnia is the subject of sint, and vera is the predicate adjective agreeing with it.

So literally:

• omnia vera sint = all things are true

Idiomatic English usually says:

• everything is true

even though Latin uses a plural expression.

A simple way to break it up is:

• Censor = subject
• professionem facilem dictu putat = main clause
• quasi omnia vera sint = subordinate clause with quasi

So the core idea is:

• The censor thinks the claim easy to say
• as if everything were true

The quasi clause adds the speaker’s comment on that judgment.

Not especially unusual for Latin.

Latin word order is much freer than English, so the sentence can place words for emphasis rather than strict grammatical necessity.

Here, professionem facilem dictu stays together as a meaningful unit, and quasi omnia vera sint comes after it as a final comment.

English has to be more rigid, but Latin does not. The endings, not the position, tell you how the words function.